US1632928A - Takes shaw - Google Patents

Description

June 21 1927. J. SHAW MANUFACTURE OF PAPER PULP BOTTLES AND THE LIKE Filed June 24, 1926 Fig. 2

- JaaS fi/aw W Patented June 21, 1921.

UNITED STATES. PATENT OFFICE.

sums straw, or arm rmucrsco, camroaura, ASBIGNOB 'ro BELLE 1:. saw, or I LODI, cunomrm.

' HANUI'A CTURE 01' PAIEB-PULP BOTTLES AND THE nnm.

' Applicationflled June 24, 1988. Serlai No. 118,152.

This invention relates to improvements in methods and means for. manufacturing paper pulp milk bottles and the like, which have restricted neck or mouth openings 6 which renders the use of solid 'and non-disintegrating which has heretofore prevented the manufacture of such bottles in a commercially practicable manner.

The principal bject of my invention therefore is to provide a special form of core for use in the-manufacture of such bottles, a means for making the core and a means 'for making the bottle in connection with the core which enables the use of a solid mold for the bottle and renders it an easy matter to pour or force the pulp into the'mold' in order for said bottle forming s Generally my improvement in the manufacture of these bottles-contemplates the use of a core of ice which is allowed to melt when it has served its purpose and which is made and mounted inthe bottle mold, as

hereinafter seen.

A further object of the invention is to 1 produce a simple and inexpensive device and yet one which will be exceedin ly efiective for the purpose for which it is esigned.

These ob ects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings sim'lar characters of reference indicate corresponding partsin the several views:

. Fig. 1 is a sectional elevation of a milk bottle core-mold.

Fi 2 is a similar view of the bottle mold 40 showing the core mounted in the mold.

Fig. 3 is a fragmentary bottom plan view of the bottle mold cap.

Fig. 4 is a fragmentary cross section of the mold.

Referring now more particularly to the characters of reference on the drawings the numeral 1 denotes a flat supporting element having an upstanding circular flange 2 to removably receive and locate the lower end of the core mold 3. This mold is made of a suitable metal orother material having high heat conductlng properties.

cores impossible-a feature.

plulp to assume the proper;

The mold has a longitudinal opening 4in the form of an inverted milk bottle, the portion of said opening which corresponds to the sides of the milk bottle having a slight diverging slope towards its upper end so that the core when formed can be readily withdrawn from the mold when the latter is inverted.

A cap 5 is mounted for. vertical adjustment on the top of the mold and extends downwardly into the same a certain distance; The bottom of the cap has an outline corresponding to. that desired for. the interior of the bottom of the bottle to be .formed and is so located relative to the opening 4 that the enclosed chamber thus formed in the mold is equal'in size and shape to that of the interior of a standard milk bottle of certain capacity.- 7 f The ca has a number of vertical and small ori ces 6 therethrough so that air can escape from the chamber when the water enters the same at the opposite end.

Mounted on the sup ort 1 centrally of the mold is a hollow cone pipe 8 pro'ecting upwardly from below. the sup ort. llS cone is centralized relat1ve to t e. lower end of the mold opening and projects upwardly into the same a certain distance. The cone has a plurality of onfices 9 leading from the pipe to the interior of the mold area. 1

To form the core the operations are preferably carried out in a room in which the tem erature is maintained as low as 1s pracconnected to awater tica 1e and very cold water is allowed to enter the mold from the pipe 8 in such ner as notto fill the mold chamber to top but only to a certain level, as at The proper volume of the waterls ca culated so that when expansion due to freezing, takes place, the ice williill the entire chamber and will take the shape of the surrounding mold walls, as well as that of the bottom of the cap 5. After the'water been poured into the mold and frozen cap is removed from the mold and the latter is inverted so that the core may shde'out.

a manthe The core 10 is then a solid piece of ice with a cone-shaped socket at one and correspondin to the cone 7. For making the bottle I provide a vertical mold 11 arranged to be removably located on a flat supporting element 12 by means of an upstanding continuous flange 13 thereon. The mold has a longitudinally extending opening 14 therein, tapered toward its upper end to correspond to the taper of the core. At the upper end of said opening a hollow cap 15 is fitted onto the mold. The chamber in the mold thus formed by the side walls a and the cap and extending between said cap and the lower end of the mold is symmetrical to the core 10 but larger, being of a size equal to the exterior contour of the bottle to be formed. The cap 15 has a plurality of small concentric grooves 16 in its lowerfa ce, from which grooves small holes 17 lead into the enclosed chamber 18 formed in the cap.

Mounted on'the support 13 centrally of the mold is a circul-anflange member 19 whose diameter is-intermediate the exterior and interior diameter of the bottle at the mouth, and which projects somewhat above thelevel of the support 13 on which the mold rests. Projecting upwardly and centrally from said flange is a cone 20, exactl the same size as the cone 7 of the core mol The cone and flange are connected to a pipe 21 through which the pulp is fed from a suitable source of supply, radial holes 22 leading from the pipe to the rim of the flan e. The opening 14 in the bottle mold,

pre erably has a large number of small vertical grooves down its sides from the cap 15 to the bottom of the mold, said grooves being shown in exaggerated form at 23 in e 4. In operation the core having been ma the cap 15 of the bottle mold is removed and the core 10 is inserted. l

The socket in the core fits over the cone 20 so that the core is centrally located in the mold 11 relative to the opening 14 and of course is spaced from the'sides of said opening as well as from a .cap 15 a certain distance. A space all around the core is therefore formed in the bottle mold, the width of thisspace determining the thickness of the bottle. Pulp of a suitable character and also maintained at a low tem rature' is then forced u wardly through the pipe 21 and into said space through the openings 22 tocform the bottle 24. The air displaced from the mold space with the advancing pulp passes into the chamber 18 of the cap, being there compressed to a certain extent. The pressure on the incoming pulp being greater than that of this confined air, water from the pulp is also forced into the chamber 18. The pulp being of a fibrous nature will not however pass through the small holes 17 nor lodge in the grooves 16,

but will lie. across the same. The result is that the majority of the water in the pulp mixture will be immediately drained ro the same, leaving the pulp in the mold-space in a firm condition.

Should the holes 17 lend to become clogged, an intermittent slackening-up action on the pulp pressure will cause the air pressure to act to blow through and unclog the holes, as will be evident.

The grooves 16 aid in carrying oil the water from the pulp into the holes 17 while the vertical grooves 23 (which are arranged to connect with the outermost groove 16) drain the water from the sides of the bottle, these grooves beingso small that the pulp will merely lie across the same. Owing to the flange 19, when the bottle is formed a circular depression around the inside of the mouth of the bottle will be provided to receive the usual cover cap.

When the bottle has been completely poured the mold is removed from the support and inverted. The water in the cap will then drop to the bottom of the chamber 18, and the cap is then removed. The mold is then placed in a warm room so that the core will melt and flow out, when the bottle may be withdrawn from the mold. From the foregoin description it will be readily seen that I ave pfirfiduced such a device as substantially fu s the objects of the invention asset forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to .as do not form a departure from the spirit of the invention, as defined by the ap nded claims.

Having thus descri d my invention what I claim as new and useful and desire to secure by Letters Patent is:

1. A method of making a paper pulp vessel in a mold consisting in placing in the mold chamber, a core made .of ice, pouring the pulp into the mold around the core, and allowing the core to melt.

2. In combination, a mold having an interior chamber whose area and shape is that of the interior of a vessel to be made, and an ice core to fit in 'said'chamber in spaced relation to the walls thereof.

'3. In combination, a mold having an interior chamber whose area and shape is that mold consisting in lacing in the mold chamber, a core made 0 a solid but meltable substance, pouring the pulp into the mold owing the core and means for introducing pulp into the space between the core and mold at the bot- 5. ln eo1nbination,a vertical mold having tom of the latter, the inner walls of the a longitudinal chamber open on its upper mold having longitudinal grooves leading 5 end, a cap having a plurality of perforafrom the bottomtothe cap.

tions therethrongh to fit in the top of the In testimony whereof I afiix my signature.

mold, a core to fit in the mold chamber in spaced relation to the side-walls and cap, JAMES SHAW.

around the core, and then all lo melt.

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