WO2024148407A1 - Assembly for the progressive embossing of sheets of paper - Google Patents
Assembly for the progressive embossing of sheets of paper Download PDFInfo
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- WO2024148407A1 WO2024148407A1 PCT/BR2023/050007 BR2023050007W WO2024148407A1 WO 2024148407 A1 WO2024148407 A1 WO 2024148407A1 BR 2023050007 W BR2023050007 W BR 2023050007W WO 2024148407 A1 WO2024148407 A1 WO 2024148407A1
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- WO
- WIPO (PCT)
- Prior art keywords
- embossing
- paper
- tissue paper
- steel
- continuous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0707—Embossing by tools working continuously
- B31F2201/0715—The tools being rollers
- B31F2201/0741—Roller cooperating with a non-even counter roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0756—Characteristics of the incoming material, e.g. creped, embossed, corrugated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0758—Characteristics of the embossed product
- B31F2201/0761—Multi-layered
- B31F2201/0764—Multi-layered the layers being nested
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0771—Other aspects of the embossing operations
- B31F2201/0774—Multiple successive embossing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0784—Auxiliary operations
- B31F2201/0787—Applying adhesive
Definitions
- the present Invention refers to technical and functional improvements specially created to generate a progressive embossing (on the same embossing elements) of at least two continuous strips of paper, traditionally known as “tissue paper”, which, after When juxtaposed, they form a continuous strip of bulky, soft paper for making toilet paper.
- tissue paper traditionally known as “tissue paper”
- embossing is currently a widely used technique to alter the texture, feel, volume and appearance of certain paper products supplied in rolls or sheets, such as toilet paper, paper towel, tissue paper, paper napkin and others. All of them can be produced with just one layer or with two or more layers.
- embossing defines decorated surfaces on both sides of the paper.
- the “stamp” adopted for embossing allows for a variety of combinations of reliefs that contribute to obtaining all sorts of designs, which significantly improves the appearance of the paper, even suggesting its good quality and origin, thus adding more resources to secure the brand of the product to the end consumer.
- the tissue paper embossing process has as its main objective the construction of reliefs on the surface of the tissue paper, generally to increase thickness, softness and/or for aesthetic purposes.
- FIG. 1 The steel/rubber process is illustrated schematically in figure 1, where it can be seen that the tissue paper (1A), with at least one layer, passes between an engraved steel roller (2) and a rubber roller ( 3), where the pressure between them causes the engraving (4) to be pressed against the surface of the tissue paper (1A) forcing it against the rubberized surface of the roll (3), consequently, the engraving (4) is transferred for tissue paper (1A) by a process of deformation of the contact points/elements.
- tissue paper (1A) and (1N) are combined into a set (5) here called an integrated module, as it integrates two sets of steel/rubber embossing, where at least one layer receives glue and The layers are juxtaposed, forming a finished continuous strip for making toilet paper or paper towel rolls.
- the steel/steel process (with variations) is illustrated schematically in figure 2, where it can be seen that the tissue paper (1A) passes between two engraved steel rolls (2), where the engravings (4) are from the male and female type. In this process, the sheets of paper are formed, as There is a space between the elements of the embossing rollers.
- the continuous strip of tissue paper produced may or may not be combined with similar ones to form a continuous strip, depending only on the final characteristics of the product (toilet paper, napkins, tissue paper, interleaf towels and others).
- the steel/paper process is illustrated schematically in figure 3, where it can be seen that the tissue paper (1A) passes between an engraved steel roll (2) and a smooth paper-coated roll (6) (smooth roll on an engraving process by the steel roll), as soon as the engraving process of the paper roll (7) is complete, the paper embossing process can be carried out, thus producing a continuous strip of embossed paper (1A) and, Likewise, this continuous tissue paper strip produced can be combined with similar ones to form a continuous plastered strip used to manufacture toilet paper.
- FIG 4 shows a complete integrated tissue paper embossing station or module.
- the usual process is defined to process two or more continuous strips of tissue paper (1A) and (1N), which pass equally between steel (2) and rubber (3) rolls, between which each strip is embossed.
- glue applicator rollers (8) act against the corresponding surface of one of the tissue paper strips, in this case the strip (1A).
- FIGS 5A to 5C schematically show that, regardless of the number of embossing units, the embossing concept is the same and is generally limited to the process with steel roller (2) and rubber roller (3).
- FIG 5A there are two embossing points.
- figure 5B there are three embossing points.
- figure 5C there are 4 embossing points.
- Figure 6B shows the combination (DESL), “double embossing synchronized laminated”, where the layers are synchronized when overlapped and, in this case, male/female synchronism occurs with union by pressing roller (9).
- Figure 6C shows the combination (PTP), where the layers are synchronized when overlapped and, in this case, “point to point” synchronization occurs with compression union between the steel rolls.
- Figure (7A) shows the combination (DERL).
- Figure (7B) shows the point-to-point combination (PTP).
- Figure (7C) shows the combination (OFF).
- the paper embossing process is carried out using the steel/rubber process.
- the thickness (deformation) of the paper will generally be less than the level of penetration of the embossing elements into the rubber due to the resilience of the paper when leaving the embossing zone.
- the level of penetration into the rubber is limited mainly by the characteristics for deformation/resilience of the rubber and secondarily by the type of embossing pattern/design and the requirements of the finished product.
- embossing stages in the same integrated module, that is, an upper embossing and a lower embossing, both steel/rubber, and then a third stage of progressive embossing with between the steel rollers (2) in the concept steel/steel.
- the embossing or deformation process of the strips begins in the first and second stages with the steel/rubber concept and the deformation is progressively increased in the third stage with the steel/steel concept, completing the previous stages, producing advantageous effects. , that is, greater levels of penetration that result in greater thicknesses in the tissue paper strip, consequently, relief effects or three-dimensional effects are obtained resulting in continuous tissue paper strips that are much more significant than conventional DESL.
- FIGS. 1 to 7B are schematic views exemplifying conventional embossing processes.
- Figure 8 shows a schematic view of an embossing module according to the present invention. Detailed description of the invention.
- the present SET FOR PROGRESSIVE EMBOSSING OF PAPER SHEETS is characterized by comprising: [26] - at least two embossing stages, an upper one (10) and a lower (11), as well as a progressive intermediate stage (12), all of them for the respective continuous tissue paper strips (1A) and (1N); [27] - the upper embossing stage (10) is formed by a rubber roller (3) that rotates clockwise and, beneath it, a steel roller (2) with engraving (4) is pressed and which rotates clockwise.
- the lower embossing stage (11) is formed by a rubber roller (3) that rotates counterclockwise and, on top of it, is pressed a steel roller (2) with engraving (4) and which rotates clockwise, passing between these rollers (2-3) continuous strips of tissue paper (1N);
- the third or progressive intermediate stage of embossing (12) is formed by the same steel rollers (2), both are synchronized, where the engravings (4) are male and female, between which the continuous strips of tissue paper (1A) and (1N);
- [30] - at least one of the continuous tissue paper strips (1A) and (1N) receive adhesive from glue applicator rolls (8) tangentially mounted on the steel rollers (2) on the input side of the continuous tissue paper strips ( 1A) and (1N); and [31] - after the third or progressive intermediate stage of embossing (12) the continuous strips of tissue paper (1A) and (1N) are finished by the feeler roller or pressing
- Continuous strips of tissue paper (1A) and (1N) may vary with regard to the number of layers, that is, the strip (1A) may have more than one layer, the same happens with the strip (1N ).
- we have: --- smaller than P1 /P2 X YX > YX ⁇ YA and B --- final deformation of the paper A-------- greater than
- This embossing set has only one embossing stage for at least one continuous strip of tissue paper (1A) and one stage for at least one continuous strip of tissue paper (1N) and both are embossed separately.
- the embossing process is carried out using the steel/rubber concept and normally in this case the depth/penetration is limited by the inherent characteristics of this process (steel/rubber).
- the same concept/stages as conventional DESL are maintained, but we have an additional stage with the steel/steel concept where continuous strips of tissue paper (1A) and (1N) are embossed simultaneously.
- the penetration limitation in the third stage would be the engraving depth (P), thus we can obtain/achieve thickness levels significantly higher than the conventional OFF concept as the main advantage of this concept.
- P engraving depth
- Another difference or advantage of the concept of the present invention is the perfect and stable synchronization between the continuous tissue paper strips (1A) and (1N) progressively embossed, which guarantees the high-relief effect of the final product.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
- Sanitary Thin Papers (AREA)
Abstract
Description
CONJUNTO PARA GOFRAGEM PROGRESSIVA DE FOLHAS DE PAPEL. Campo da Invenção. [01] Mais particularmente a presente Invenção refere-se a aprimoramentos técnicos e funcionais especialmente criados para gerar uma gofragem progressiva (sobre os mesmos elementos de gofragem) de pelo menos duas tiras contínuas de papel, conhecidas tradicionalmente como “papel tissue” que, depois de justapostas, formam uma tira continua de papel volumoso e macio para fabricação de papel higiênico. Estado da técnica. [02] Como é de conhecimento, atualmente a gofragem é uma técnica amplamente utilizada para alterar a textura, o tato, o volume e a aparência de determinados produtos de papel fornecidos em rolos ou em folhas, tal como acontece com o papel higiênico, papel toalha, lenço de papel, guardanapo de papel e outros. Todos eles podem ser produzidos apenas com uma camada ou com duas ou mais camadas. Cada camada sofre um processo de gofragem que, resumidamente, poderia se dizer que é um processo similar ao da estampagem, onde os meios mecânicos utilizados exercem pressão sobre a superfície lisa do material causando-lhe uma pluralidade de deformações em alto e baixo relevo que, se combinam entre si para definir um padrão de gofragem, desde o mais simples definidos por detalhes geométricos, até os mais elaborados que formam verdadeiros desenhos de arte. Assim, a tecnologia da gofragem do papel acabou por ser um recurso eficiente para alterar as características de uma folha de papel, principalmente quando a mesma é formada por duas ou mais camadas, somando- lhes vantagens importantes, ou seja, inicialmente, a gofragem altera a textura do papel, tornando-o muito macio e delicado, o que favorece o tato agradável. Da mesma forma, alterando-se a textura o volume também é substancialmente alterado para maior, ou seja, o papel deixa de ter aquele aspecto liso e efeito “compacto” e passa a ter um aspecto mais “leve e fofo”, isso com a mesma quantidade de papel. No que se refere à aparência, sem dúvida, a gofragem define superfícies decoradas dos dois lados do papel. Logicamente o “cunho” adotado para gofragem permite uma variedade de combinações de relevos que concorre para se obter toda sorte de desenhos, o que melhora significativamente o visual do papel, inclusive sugere a sua boa qualidade e procedência, somando com isso mais recursos para firmar a marca do produto junto ao consumidor final. [03] Atualmente são conhecidos diferentes equipamentos para gofragem de papel, todos eles combinam uma série de cilindros gravados e não gravados, alguns metálicos outros de borracha, porém, independentemente de tais aspectos, cada máquina possui as suas particularidades inerentes ao produto final, tal como ensinam os documentos abaixo relacionados: BR102012008803 – publicado em 15/04/2014 APERFEIÇOAMENTO EM CILINDRO PARA LAMINAÇÃO DE PAPEL TISSUE BR102012025250 – publicado em 19/04/2016 APERFEIÇOAMENTO EM CILINDROS GOFRADORES PARA LAMINAÇÃO DE PAPEL TISSUE BR102013026900 – publicado em 25/08/2015 CONJUNTO GOFRADOR PARA PROCESSAMENTO DE PAPEL BR112020022071 – publicado em 02/02/2021 APERFEIÇOAMENTO EM CONJUNTO GOFRADOR PARA PROCESSAMENTO DE PAPEL US3556907 – publicado em 19/01/1969 MÁQUINA PARA PRODUZIR PAPEL LAMINADO EM RELEVO US6245414 – publicado em 12/06/2001 MÁQUINA DE GRAVAÇÃO E LAMINAÇÃO PARA COLAR CAMADAS EM RELEVO US5382464 – publicado em 17/01/1995 PAPEL GOFRADO DE MÚLTIPLAS CAMADAS E MÉTODO E APARELHO DE FABRICAÇÃO EP2674505 – publicado em 18/12/2013 MÉTODO DE FABRICAÇÃO DE ROLO DE ROTOGRAVURA E ROLO DE ROTOGRAVURA WO2018229676 – publicado em 20/12/2018 DISPOSITIVO PARA MICROGRAMPO DE PAPEL E LINHA DE PROCESSAMENTO DE PAPEL COMPREENDENDO O REFERIDO DISPOSITIVO EP0370972 – publicado em 30/05/1990 MÁQUINA DE GRAVAÇÃO DE PAPEL BRPI0512124A – publicado em 06/02/2008 [04] Portanto, o papel tissue, devido as suas características peculiares, é largamente utilizado em diferentes produtos, notadamente o papel higiênico, o papel toalha e o papel guardanapo, entretanto, para enriquecer a qualidade de tais produtos, os mesmos passam por processo de gofragem que, tradicionalmente, pode variar de acordo com o produto a ser obtido. [05] Assim, o processo de gofragem (emboçado) de papeis tissue tem como objetivo principal a construção de relevos na superfície do papel tissue geralmente para aumento de espessura, maciez e/ou para fins estéticos. [06] Atualmente existem três processos para gofragem: aço/borracha, aço/aço (com variações) e aço/papel. As características básicas destas três tecnologias estão genericamente ilustradas nas figuras 1, 2 e 3, onde a “forma denteada dos cilindros é apenas exemplificativa da área de gravação dos mesmos”. Pois tal gravação, como já foi dito, variam significativamente de acordo os critérios de cada fabricante de papel higiênico. [07] O processo aço/borracha está ilustrado esquematicamente na figura 1, por onde se verifica que o papel tissue (1A), com pelo menos uma camada, passa por entre um rolo de aço gravado (2) e um rolo de borracha (3), onde a pressão entre os mesmos faz com que a gravação (4) seja pressionada contra a superfície do papel tissue (1A) forçando- o contra a superfície emborrachada do rolo (3), consequentemente, a gravação (4) é transferida para o papel tissue (1A) por um processo de deformação dos pontos/elementos de contato. Desta forma, duas ou mais tiras contínuas de papel tissue (1A) e (1N) são combinadas em um conjunto (5) aqui denominado de modulo integrado, pois integra dois conjuntos de gofragem aço/borracha, onde pelo menos uma camada recebe cola e as camadas são justapostas, formando uma tira contínua acabada para fabricação de rolos de papel higiênico ou papel toalha. [08] O processo aço/aço (com variações) está ilustrado esquematicamente na figura 2, por onde se verifica que o papel tissue (1A) passa por entre dois rolos de aço gravado (2), onde as gravações (4) são do tipo macho e fêmea. Neste processo as folhas de papel são conformadas, pois existe um espaço entre os elementos dos rolos gofradores. Da mesma forma, a tira contínua de papel tissue produzida pode ou não ser combinada com outras iguais para formação de uma tira continua emboçada, dependendo apenas das características finais do produto (papel higiênico, guardanapos, lenços de papel, toalhas interfolhadas e outros). [09] O processo aço/papel está ilustrado esquematicamente na figura 3, por onde se verifica que o papel tissue (1A) passa por entre um rolo de aço gravado (2)e um rolo revestido de papel liso (6) (rolo liso sobre um processo de gravação pelo rolo de aço), assim que terminar o processo de gravação do rolo de papel (7) é que o processo de gofragem do papel poderá ser feito, produzindo assim uma tira contínua de papel gofrado (1A) e, da mesma forma, a esta tira contínua de papel tissue produzida pode ser combinada com outras iguais para formação de uma tira continua emboçada utilizada para fabricação de papel higiênico. [10] A figura 4 mostra uma estação ou modulo integrado completo de gofragem de papel tissue. Nesta figura o processo usual é definido para processar duas ou mais tiras contínuas de papel tissue (1A) e (1N), que passam igualmente entre rolos de aço (2) e de Borracha (3), entre os quais cada tira é gofrada. Em pelo menos um dos rolos de aço (2) atuam rolos aplicadores (8) de cola contra a superfície correspondente de uma das tiras de papel tissue, no caso a tira (1A). Os dois rolos de aço (2) trabalham de forma adjacente e conduzem as tiras contínuas de papel tissue (1A) e (1N) de modo que as mesmas fiquem justapostas, o que acontece em conjunto com um rolo apalpador ou rolo prensor (9) que tem a função de unir as folhas, após o qual forma-se uma tira continua gofrada de papel tissue com duas ou mais camadas e posteriormente é utilizada para fabricação de rolos de papel higiênico ou papel toalha. [11] As figuras 5A a 5C mostram esquematicamente que, independentemente do numero de unidade de gofragem, o conceito de gofragem é o mesmo e geralmente está limitado ao processo com rolo de aço (2) e rolo de borracha (3). Na figura 5A ocorrem dois pontos de gofragem. Na figura 5B ocorrem três pontos de gofragem. Na figura 5C ocorrem 4 pontos de gofragem. [12] Por outro lado, conforme mostram as figuras 6A a 6C, embora usualmente o processo de gofragem é realizado com rolos aço/borracha, aço/aço e aço/papel, as tiras de papel tissue gofradas podem ser combinadas de maneiras diferentes, dentre as quais destacam-se: combinação (DERL), combinação (DESL) e combinação (PTP). [13] A figura 6A mostra a combinação (DERL), “double embossing randomic laminated”, onde as camadas são unidas pelo rolo prensor (9) e não tem sincronismo de sobreposição (rolo/folha), ou seja, não há sincronismo das áreas gravadas. [14] A figura 6B mostra a combinação (DESL), “double embossing synchronized laminated”, onde as camadas são sincronizadas quando sobrepospostas e, neste caso, ocorre sincronismo macho/fêmea com união por rolo prensor (9). [15] A figura 6C mostra a combinação (PTP), onde as camadas são sincronizadas quando sobrepospostas e, neste caso, ocorre sincronismo “ponto a ponto” com união por compressão entre os rolos de aço. [16] A figura (7A) mostra a combinação (DERL). A figura (7B) mostra a combinação (PTP) ponto a ponto. A figura (7C) mostra a combinação (DESL). [17] Ainda com referência às figuras 7A – 7C, nas atuais unidades de gofragem com sistema de laminação de adesivo, o processo de gofragem do papel é feito com o processo aço/borracha. [18] Nos processos de gofragem aço/borracha a espessura (deformação) do papel geralmente será menor que o nível de penetração dos elementos de gofragem na borracha devido à resiliência do papel ao deixar a zona de gofragem. [19] Geralmente o nível de penetração na borracha fica limitado principalmente pelas características para deformação/resiliência da borracha e em segundo plano pelo tipo de padrão/desenho da gofragem e dos requerimentos do produto terminado/acabado. [20] Então, conforme mostram as figuras acima, temos: X e Y= ---- penetração na borracha P1/P2= ---- profundidade de gravação P1/P2 ----- iguais ou diferentes X e Y ----- menores que P1/P2 X = Y X > Y X < Y A e B --- deformação final do papel A ------- menor que X B ------- menor que Y Objetivos da Invenção. [21] O principal objetivo da presente Invenção são aprimoramentos técnicos e funcionais da tecnologia (DESL), mantendo-se o mesmo conceito/estágios do processo (DESL) convencional, porém, somando um estagio adicional de forma que o processo de gofragem das tiras seja feita de forma progressiva com o conceito de gofragem aço/aço em sequência, onde as tiras contínuas de papel tissue superior e inferior são novamente gofradas em sequência e de forma simultaneamente, caracterizando um estágio complementar progressivo. Neste caso teremos pelo menos três estágios de gofragens no mesmo módulo integrado, ou seja, uma gofragem superior e uma gofragem inferior, ambas aço/borracha, e na sequência um terceiro estágio de gofragem progressiva com entre os rolos de aço (2) no conceito aço/aço. Desta forma o processo de gofragem ou deformação das tiras se inicia no primeiro e no segundo estágio com o conceito aço/borracha e a deformação é incrementada no terceiro estágio com o conceito aço/aço de forma progressiva, completando os estágios anteriores, produzindo efeitos vantajosos, ou seja, maiores níveis de penetração que resultam em espessuras maiores na tira de papel tissue, consequentemente, são obtidos efeitos de relevo ou efeitos tridimensionais resultantes nas tiras contínuas de papel tissue muito mais significativos que o DESL convencional. Outra diferença ou vantagem do conceito da presente invenção é o perfeito e estável sincronismo/fase resultante entre as tiras contínuas de papel tissue superior e inferior o que garante o efeito de alto relevo do produto final. Descrição dos desenhos. [22] Para melhor compreensão da presente Invenção, é feita em seguida uma descrição detalhada da mesma, fazendo-se referências aos desenhos anexos. [23] Figuras de 1 a 7B são vistas esquemáticas exemplificando os processos convencionais de gofragem. [24] Figura 8 mostra uma vista esquemática de um módulo de gofragem de acordo com a presente invenção. Descrição detalhada da invenção. [25] De acordo com a ilustração da figura 8 e em seus pormenores, o presente CONJUNTO PARA GOFRAGEM PROGRESSIVA DE FOLHAS DE PAPEL, está caracterizado por compreender: [26] - pelo menos dois estágios de gofragem, um superior (10) e um inferior (11), como também um estágio intermediário progressivo (12), todos eles para as respectivas tiras contínuas de papel tissue (1A) e (1N); [27] - o estágio de gofragem superior (10) é formado por rolo de borracha (3) que gira no sentido horário e, sob o mesmo, está pressionado um rolo de aço (2) com gravação (4) e que gira no sentido anti-horário, passando entre tais rolos (2-3) a tira contínua de papel tissue (1A); [28] - o estágio de gofragem inferior (11) é formado por rolo de borracha (3) que gira no sentido anti-horário e, sobre o mesmo, está pressionado um rolo de aço (2) com gravação (4) e que gira no sentido horário, passando entre tais rolos (2-3) a tiras contínuas de papel tissue (1N); [29] - o terceiro ou estágio intermediário progressivo de gofragem (12) é formado pelos mesmos rolos de aço (2), ambos são sincronizados, onde as gravações (4) são macho e fêmea, entre os quais passam simultaneamente as tiras contínuas de papel tissue (1A) e (1N); [30] - pelo menos uma das tiras contínuas de papel tissue (1A) e (1N) recebem adesivo de rolos aplicadores de cola (8) tangencialmente montados nos rolos de aço (2) do lado de entrada das tiras contínuas de papel tissue (1A) e (1N); e [31] - após o terceiro ou estágio intermediário progressivo de gofragem (12) as tiras contínuas de papel tissue (1A) e (1N) são finalizadas pelo rolo apalpador ou rolo prensor (9). [32] As tiras contínuas de papel tissue (1A) e (1N) podem variar no que se refere ao número de camadas, ou seja, a tira (1A) poderá ter mais de uma camada, o mesmo acontece com a tira (1N). [33] Ainda com relação à figura 8, temos: X e Y= ---- penetração na borracha P1/P2= ---- profundidade de gravação P1/P2 ----- iguais ou diferentes X e Y ----- menores que P1 /P2 X = Y X > Y X < Y A e B --- deformação final do papel A-------- maior que X B-------- maior que Y [34] Tal como o conceito DESL convencional o presente conjunto gofrador possui somente um estágio de gofragem para pelo menos uma tira contínua de papel tissue (1A) e um estágio para pelo menos uma tira contínua de papel tissue (1N) e ambas são gofradas separadamente. O processo de gofragem e feita pelo conceito aço/borracha e normalmente neste caso a profundidade/penetração fica limitada pelas características inerentes deste processo (aço/Borracha). [35] Na presente invenção é mantido o mesmo conceito/estágios do DESL convencional, mas temos um estagio adicional com o conceito aço/aço onde as tiras contínuas de papel tissue (1A) e (1N) são gofradas simultaneamente. Neste caso temos três estágios de gofragem no mesmo módulo e o processo de gofragem pode ser feito de forma progressiva, sendo no primeiro e segundo estágios aço/borracha e o terceiro estágio ou estágio intermediário aço/aço. [36] No conceito da presente invenção a limitação de penetração no terceiro estágio seria a profundidade da gravação (P), assim poderemos obter/alcançar níveis de espessura significativamente superiores ao conceito DESL convencional como principal vantagem deste conceito. [37] Tendo-se maiores níveis de penetração no módulo da presente invenção, consequentemente, temos maiores espessuras no papel e efeitos de relevo ou efeitos tridimensionais resultantes no papel muito mais significativos que o DESL convencional. [38] Outra diferença ou vantagem do conceito da presente invenção é o sincronismo perfeito e estável entre as tiras contínuas de papel tissue (1A) e (1N) gofradas progressivamente, o que garante o efeito de alto-relevo do produto final. [39] Será compreendido que determinadas características e combinações das tiras de papel tissue e dos cilindros gofradores aço/aço podem variar consideravelmente mantendo-se o mesmo conceito funcional para o conjunto, consequentemente, nota-se que a construção ora descrita em detalhes à título de exemplo está claramente sujeita a variações construtivas, porém, sempre dentro do escopo do conceito inventivo ora revelado de uma terceira gofragem intermediária e progressiva realizada com rolos de aço que inclui gofragem mesclada DESL, e como muitas modificações podem ser feitas na configuração ora detalhada de acordo com as exigências descritivas da lei, é entendido que os detalhes presentes devam ser interpretados como de forma ilustrativa e não limitadora. SET FOR PROGRESSIVE EMBOSSING OF PAPER SHEETS. Field of Invention. [01] More particularly, the present Invention refers to technical and functional improvements specially created to generate a progressive embossing (on the same embossing elements) of at least two continuous strips of paper, traditionally known as “tissue paper”, which, after When juxtaposed, they form a continuous strip of bulky, soft paper for making toilet paper. State of the art. [02] As you know, embossing is currently a widely used technique to alter the texture, feel, volume and appearance of certain paper products supplied in rolls or sheets, such as toilet paper, paper towel, tissue paper, paper napkin and others. All of them can be produced with just one layer or with two or more layers. Each layer undergoes an embossing process which, in short, could be said to be a process similar to that of stamping, where the mechanical means used exert pressure on the smooth surface of the material causing a plurality of deformations in high and low relief which, combine with each other to define a pattern of embossing, from the simplest defined by geometric details, to the most elaborate that form true art designs. Thus, paper embossing technology turned out to be an efficient resource for changing the characteristics of a sheet of paper, especially when it is made up of two or more layers, adding important advantages, that is, initially, embossing changes the texture of the paper, making it very soft and delicate, which favors a pleasant touch. In the same way, by changing the texture, the volume is also substantially changed to be larger, that is, the paper stops having that smooth appearance and “compact” effect and starts to have a more “light and fluffy” appearance, this with the same amount of paper. In terms of appearance, without a doubt, embossing defines decorated surfaces on both sides of the paper. Logically, the “stamp” adopted for embossing allows for a variety of combinations of reliefs that contribute to obtaining all sorts of designs, which significantly improves the appearance of the paper, even suggesting its good quality and origin, thus adding more resources to secure the brand of the product to the end consumer. [03] Different equipment for embossing paper is currently known, all of them combine a series of engraved and unengraved cylinders, some metallic and others made of rubber, however, regardless of these aspects, each machine has its own particularities inherent to the final product, as shown in the documents listed below: BR102012008803 – published on 15/04/ 2014 IMPROVEMENT IN CYLINDER FOR LAMINATING TISSUE PAPER BR102012025250 – published on 19/04/2016 IMPROVEMENT IN EMBOSSING CYLINDERS FOR LAMINATING TISSUE PAPER APEL BR112020022071 – published on 02/02/ 2021 IMPROVEMENT IN EMBOSSING ASSEMBLY FOR PAPER PROCESSING US3556907 – published on 01/19/1969 MACHINE FOR PRODUCING EMBOSSED LAMINATED PAPER US6245414 – published on 06/12/2001 ENGRAVING AND LAMINATION MACHINE FOR GLUING EMBOSSED LAYERS US5382464 – published on 17/ 01/1995 MULTI-LAYER EMBOSSED PAPER AND MANUFACTURING METHOD AND APPARATUS EP2674505 – published on 12/18/2013 METHOD OF MANUFACTURING ROTOGRAVING ROLLS AND ROTOGRAVING ROLLS WO2018229676 – published on 20/12/2018 DEVICE FOR PAPER MICROCLAMP AND PAPER PROCESSING LINE COMPRISING SAID DEVICE EP0370972 – published on 30/05/1990 ENGRAVING MACHINE PAPER ACTION BRPI0512124A – published on 02/06/2008 [04] Therefore, tissue paper, due to its peculiar characteristics, is widely used in different products, notably toilet paper, towel paper and napkin paper, however, to enrich the quality of Such products undergo an embossing process which, traditionally, may vary according to the product to be obtained. [05] Thus, the tissue paper embossing process has as its main objective the construction of reliefs on the surface of the tissue paper, generally to increase thickness, softness and/or for aesthetic purposes. [06] There are currently three processes for embossing: steel/rubber, steel/steel (with variations) and steel/paper. The basic characteristics of these three technologies are generally illustrated in figures 1, 2 and 3, where the “dented shape of the cylinders is just an example of the area of recording them.” Because such recording, as already mentioned, varies significantly according to the criteria of each toilet paper manufacturer. [07] The steel/rubber process is illustrated schematically in figure 1, where it can be seen that the tissue paper (1A), with at least one layer, passes between an engraved steel roller (2) and a rubber roller ( 3), where the pressure between them causes the engraving (4) to be pressed against the surface of the tissue paper (1A) forcing it against the rubberized surface of the roll (3), consequently, the engraving (4) is transferred for tissue paper (1A) by a process of deformation of the contact points/elements. In this way, two or more continuous strips of tissue paper (1A) and (1N) are combined into a set (5) here called an integrated module, as it integrates two sets of steel/rubber embossing, where at least one layer receives glue and The layers are juxtaposed, forming a finished continuous strip for making toilet paper or paper towel rolls. [08] The steel/steel process (with variations) is illustrated schematically in figure 2, where it can be seen that the tissue paper (1A) passes between two engraved steel rolls (2), where the engravings (4) are from the male and female type. In this process, the sheets of paper are formed, as There is a space between the elements of the embossing rollers. Likewise, the continuous strip of tissue paper produced may or may not be combined with similar ones to form a continuous strip, depending only on the final characteristics of the product (toilet paper, napkins, tissue paper, interleaf towels and others). [09] The steel/paper process is illustrated schematically in figure 3, where it can be seen that the tissue paper (1A) passes between an engraved steel roll (2) and a smooth paper-coated roll (6) (smooth roll on an engraving process by the steel roll), as soon as the engraving process of the paper roll (7) is complete, the paper embossing process can be carried out, thus producing a continuous strip of embossed paper (1A) and, Likewise, this continuous tissue paper strip produced can be combined with similar ones to form a continuous plastered strip used to manufacture toilet paper. [10] Figure 4 shows a complete integrated tissue paper embossing station or module. In this figure the usual process is defined to process two or more continuous strips of tissue paper (1A) and (1N), which pass equally between steel (2) and rubber (3) rolls, between which each strip is embossed. On at least one of the steel rollers (2), glue applicator rollers (8) act against the corresponding surface of one of the tissue paper strips, in this case the strip (1A). The two steel rollers (2) work adjacently and guide the continuous strips of tissue paper (1A) and (1N) so that they are juxtaposed, which happens in conjunction with a feeler roller or presser roller (9) which has the function of joining the sheets, after which a continuous embossed strip of tissue paper with two or more layers is formed and is subsequently used to manufacture toilet paper or paper towel rolls. [11] Figures 5A to 5C schematically show that, regardless of the number of embossing units, the embossing concept is the same and is generally limited to the process with steel roller (2) and rubber roller (3). In figure 5A there are two embossing points. In figure 5B there are three embossing points. In figure 5C there are 4 embossing points. [12] On the other hand, as shown in Figures 6A to 6C, although the embossing process is usually carried out with steel/rubber, steel/steel and steel/paper rolls, the embossed tissue paper strips can be combined in different ways, among which the following stand out: combination (DERL), combination (OFF) and combination (PTP). [13] Figure 6A shows the combination (DERL), “double embossing randomic laminated”, where the layers are joined by the pressing roll (9) and there is no overlapping synchronism (roll/sheet), that is, there is no synchronization of the engraved areas. [14] Figure 6B shows the combination (DESL), “double embossing synchronized laminated”, where the layers are synchronized when overlapped and, in this case, male/female synchronism occurs with union by pressing roller (9). [15] Figure 6C shows the combination (PTP), where the layers are synchronized when overlapped and, in this case, “point to point” synchronization occurs with compression union between the steel rolls. [16] Figure (7A) shows the combination (DERL). Figure (7B) shows the point-to-point combination (PTP). Figure (7C) shows the combination (OFF). [17] Still referring to figures 7A – 7C, in current embossing units with an adhesive lamination system, the paper embossing process is carried out using the steel/rubber process. [18] In steel/rubber embossing processes the thickness (deformation) of the paper will generally be less than the level of penetration of the embossing elements into the rubber due to the resilience of the paper when leaving the embossing zone. [19] Generally, the level of penetration into the rubber is limited mainly by the characteristics for deformation/resilience of the rubber and secondarily by the type of embossing pattern/design and the requirements of the finished product. [20] So, as shown in the figures above, we have: ---- smaller than P1/P2 [21] The main objective of the present Invention is technical and functional improvements to the technology (DESL), maintaining the same concept/stages of the conventional (DESL) process, however, adding an additional stage so that the strip embossing process is done progressively with the concept of sequential steel/steel embossing, where continuous strips of upper and lower tissue paper are embossed again in sequence and form simultaneously, characterizing a progressive complementary stage. In this case we will have at least three embossing stages in the same integrated module, that is, an upper embossing and a lower embossing, both steel/rubber, and then a third stage of progressive embossing with between the steel rollers (2) in the concept steel/steel. In this way, the embossing or deformation process of the strips begins in the first and second stages with the steel/rubber concept and the deformation is progressively increased in the third stage with the steel/steel concept, completing the previous stages, producing advantageous effects. , that is, greater levels of penetration that result in greater thicknesses in the tissue paper strip, consequently, relief effects or three-dimensional effects are obtained resulting in continuous tissue paper strips that are much more significant than conventional DESL. Another difference or advantage of the concept of the present invention is the perfect and stable synchronization/resulting phase between the upper and lower continuous tissue paper strips, which guarantees the high relief effect of the final product. Description of the drawings. [22] For a better understanding of this Invention, a detailed description is then made, making references to the attached drawings. [23] Figures 1 to 7B are schematic views exemplifying conventional embossing processes. [24] Figure 8 shows a schematic view of an embossing module according to the present invention. Detailed description of the invention. [25] According to the illustration in figure 8 and in its details, the present SET FOR PROGRESSIVE EMBOSSING OF PAPER SHEETS is characterized by comprising: [26] - at least two embossing stages, an upper one (10) and a lower (11), as well as a progressive intermediate stage (12), all of them for the respective continuous tissue paper strips (1A) and (1N); [27] - the upper embossing stage (10) is formed by a rubber roller (3) that rotates clockwise and, beneath it, a steel roller (2) with engraving (4) is pressed and which rotates clockwise. counterclockwise, passing between these rolls (2-3) the continuous strip of tissue paper (1A); [28] - the lower embossing stage (11) is formed by a rubber roller (3) that rotates counterclockwise and, on top of it, is pressed a steel roller (2) with engraving (4) and which rotates clockwise, passing between these rollers (2-3) continuous strips of tissue paper (1N); [29] - the third or progressive intermediate stage of embossing (12) is formed by the same steel rollers (2), both are synchronized, where the engravings (4) are male and female, between which the continuous strips of tissue paper (1A) and (1N); [30] - at least one of the continuous tissue paper strips (1A) and (1N) receive adhesive from glue applicator rolls (8) tangentially mounted on the steel rollers (2) on the input side of the continuous tissue paper strips ( 1A) and (1N); and [31] - after the third or progressive intermediate stage of embossing (12) the continuous strips of tissue paper (1A) and (1N) are finished by the feeler roller or pressing roller (9). [32] Continuous strips of tissue paper (1A) and (1N) may vary with regard to the number of layers, that is, the strip (1A) may have more than one layer, the same happens with the strip (1N ). [33] Still in relation to figure 8, we have: --- smaller than P1 /P2 X = YX > YX < YA and B --- final deformation of the paper A-------- greater than This embossing set has only one embossing stage for at least one continuous strip of tissue paper (1A) and one stage for at least one continuous strip of tissue paper (1N) and both are embossed separately. The embossing process is carried out using the steel/rubber concept and normally in this case the depth/penetration is limited by the inherent characteristics of this process (steel/rubber). [35] In the present invention, the same concept/stages as conventional DESL are maintained, but we have an additional stage with the steel/steel concept where continuous strips of tissue paper (1A) and (1N) are embossed simultaneously. In this case we have three embossing stages in the same module and the embossing process can be done progressively, with the first and second stages being steel/rubber and the third stage or intermediate stage being steel/steel. [36] In the concept of the present invention, the penetration limitation in the third stage would be the engraving depth (P), thus we can obtain/achieve thickness levels significantly higher than the conventional OFF concept as the main advantage of this concept. [37] Having greater levels of penetration in the module of the present invention, consequently, we have greater thicknesses on the paper and relief effects or resulting three-dimensional effects on the paper that are much more significant than conventional OFF. [38] Another difference or advantage of the concept of the present invention is the perfect and stable synchronization between the continuous tissue paper strips (1A) and (1N) progressively embossed, which guarantees the high-relief effect of the final product. [39] It will be understood that certain characteristics and combinations of tissue paper strips and steel/steel embossing cylinders can vary considerably while maintaining the same functional concept for the set, consequently, it is noted that the construction now described in detail under the heading example is clearly subject to constructive variations, however, always within the scope of the inventive concept now revealed of a third intermediate and progressive embossing carried out with steel rollers that includes OFF mixed embossing, and as Many modifications can be made to the configuration now detailed in accordance with the descriptive requirements of the law, it is understood that the present details must be interpreted as illustrative and not limiting.
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/BR2023/050007 WO2024148407A1 (en) | 2023-01-11 | 2023-01-11 | Assembly for the progressive embossing of sheets of paper |
| EP23915216.8A EP4650162A1 (en) | 2023-01-11 | 2023-01-11 | Assembly for the progressive embossing of sheets of paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/BR2023/050007 WO2024148407A1 (en) | 2023-01-11 | 2023-01-11 | Assembly for the progressive embossing of sheets of paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024148407A1 true WO2024148407A1 (en) | 2024-07-18 |
Family
ID=91897461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/BR2023/050007 Ceased WO2024148407A1 (en) | 2023-01-11 | 2023-01-11 | Assembly for the progressive embossing of sheets of paper |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP4650162A1 (en) |
| WO (1) | WO2024148407A1 (en) |
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| EP0370972A1 (en) | 1988-11-23 | 1990-05-30 | FABIO PERINI S.p.A. | Web embossing machine |
| US5382464A (en) | 1992-03-31 | 1995-01-17 | Kayserberg, S.A. | Multi-ply embossed paper and manufacturing method and apparatus |
| CA2280404A1 (en) * | 1998-08-20 | 2000-02-20 | Paper Converting Machine Company | Embosser for producing two-ply paper products with either nested or foot-to-foot embossments |
| US6245414B1 (en) | 1995-12-05 | 2001-06-12 | Fabio Perini, S.P.A. | Embossing and laminating machine for gluing embossed layers |
| US20020091055A1 (en) * | 2000-12-22 | 2002-07-11 | Ferdinand Hein | Device and method for ply-bonding tissue products and multi-ply tissue web |
| DE102006010709A1 (en) * | 2006-03-08 | 2007-09-13 | Metsä Tissue Oyj | Embossing device for at least two-ply surface products such as toilet paper, handkerchiefs o. |
| EP2674505A2 (en) | 2012-06-14 | 2013-12-18 | Andritz Küsters GmbH | Gravure roll manufacturing method, and gravure roll |
| BR102012008803A2 (en) | 2012-04-13 | 2014-04-15 | Roll Tec Sociedade Brasileira De Cilindros Para Rotogravura Ltda | TISSUE PAPER LAMINATION CYLINDER IMPROVEMENT |
| BR102013026900A2 (en) | 2013-10-18 | 2015-08-25 | Roll Tec Cilindro Ltda | Embosser set for paper processing |
| BR102012025250A2 (en) | 2012-10-03 | 2016-04-19 | Roll Tec Sociedade Brasileira De Cilindros Para Rotogravura Ltda | improvement in embossing rolls for tissue paper lamination |
| WO2018229676A1 (en) | 2017-06-14 | 2018-12-20 | GAMBINI S.p.A. | Device for micro-embossing of paper and paper processing line comprising said device |
| US10464254B2 (en) * | 2011-04-19 | 2019-11-05 | Engraving Solutions S.R.L. | Embossing roller, embossing unit, embossing method and embossed product |
| BR112020022071A2 (en) | 2018-05-29 | 2021-02-02 | José Antonio Logiodice | improvement in embossing set for paper processing |
-
2023
- 2023-01-11 WO PCT/BR2023/050007 patent/WO2024148407A1/en not_active Ceased
- 2023-01-11 EP EP23915216.8A patent/EP4650162A1/en active Pending
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|---|---|---|---|---|
| US3556907A (en) | 1969-01-23 | 1971-01-19 | Paper Converting Machine Co | Machine for producing laminated embossed webs |
| EP0370972A1 (en) | 1988-11-23 | 1990-05-30 | FABIO PERINI S.p.A. | Web embossing machine |
| US5382464A (en) | 1992-03-31 | 1995-01-17 | Kayserberg, S.A. | Multi-ply embossed paper and manufacturing method and apparatus |
| US6245414B1 (en) | 1995-12-05 | 2001-06-12 | Fabio Perini, S.P.A. | Embossing and laminating machine for gluing embossed layers |
| CA2280404A1 (en) * | 1998-08-20 | 2000-02-20 | Paper Converting Machine Company | Embosser for producing two-ply paper products with either nested or foot-to-foot embossments |
| US20020091055A1 (en) * | 2000-12-22 | 2002-07-11 | Ferdinand Hein | Device and method for ply-bonding tissue products and multi-ply tissue web |
| DE102006010709A1 (en) * | 2006-03-08 | 2007-09-13 | Metsä Tissue Oyj | Embossing device for at least two-ply surface products such as toilet paper, handkerchiefs o. |
| US10464254B2 (en) * | 2011-04-19 | 2019-11-05 | Engraving Solutions S.R.L. | Embossing roller, embossing unit, embossing method and embossed product |
| BR102012008803A2 (en) | 2012-04-13 | 2014-04-15 | Roll Tec Sociedade Brasileira De Cilindros Para Rotogravura Ltda | TISSUE PAPER LAMINATION CYLINDER IMPROVEMENT |
| EP2674505A2 (en) | 2012-06-14 | 2013-12-18 | Andritz Küsters GmbH | Gravure roll manufacturing method, and gravure roll |
| BR102012025250A2 (en) | 2012-10-03 | 2016-04-19 | Roll Tec Sociedade Brasileira De Cilindros Para Rotogravura Ltda | improvement in embossing rolls for tissue paper lamination |
| BR102013026900A2 (en) | 2013-10-18 | 2015-08-25 | Roll Tec Cilindro Ltda | Embosser set for paper processing |
| WO2018229676A1 (en) | 2017-06-14 | 2018-12-20 | GAMBINI S.p.A. | Device for micro-embossing of paper and paper processing line comprising said device |
| BR112020022071A2 (en) | 2018-05-29 | 2021-02-02 | José Antonio Logiodice | improvement in embossing set for paper processing |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP4650162A1 (en) | 2025-11-19 |
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