CA2041116C - Doctor blade system - Google Patents
Doctor blade systemInfo
- Publication number
- CA2041116C CA2041116C CA002041116A CA2041116A CA2041116C CA 2041116 C CA2041116 C CA 2041116C CA 002041116 A CA002041116 A CA 002041116A CA 2041116 A CA2041116 A CA 2041116A CA 2041116 C CA2041116 C CA 2041116C
- Authority
- CA
- Canada
- Prior art keywords
- lamellae
- roller
- elongated
- strip
- support element
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
- B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2231/00—Inking devices; Recovering printing ink
- B41P2231/12—Axially segmented ink blades
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Coating Apparatus (AREA)
Abstract
To permit individual adjustment of lamellae (1, 1a) secured to a holding strip or rail (4), each one of the lamellae is formed with an elongated opening (8) or a slit(8a) extending to a remote end of the lamella, so that the lamellae can be individually shifted with respect to a roller (11), thereby adjusting the position of the lamellae for wear, and permitting a range of adjustment which is in excess of that which can be controlled by a film thickness adjustment screw (13).
Description
2 ~
TITLE OF THE INVENTION
DUCTOR BLADE ~Y~
FIELD OF THE INVENTION
This invention relates to a ductor blade system, and more particularly to a ductor blade which is formed of a plurality of lamellae, suitable for use in the inker of a printing m~ine, to strip ink from a ductor roller or the like.
BACKGROUND OF THE INVENTION
Various types of printing m~chin~s use inkers which include a ductor roller, dipping into, or otherwise receiving ink from an ink supply. The amount of ink on the ductor roller is controlled by eng~ging a ductor blade against the ductor roller, to strip ink therefrom. The ductor blade may include a plurality of projecting, resilient lamellae, the position of which with respect to the roller can be changed by suitable adjustment arrangements, for example adjustment screws.
German Patent No. 36 13 806 describes a ductor blade arrangement in which thin elastic plates, forming lamellae, are located adjacent each other, and secured, in common, to a receiving or support portion. The receiving or support portion is in turn connected, by example by a screw connection, to a support rail or the like on the inker of the printing m~rlline.
B
The respective lamellae are, each, attached by a screw which passes through a circular hold, for example punched into the lamellae. The position of the lamellae, with respect to the roller, thus, is determined by the position of the hole and the screw passing therethrough. The arrangement does not permit adjustment of the lamellae with respect to the roller, individually, or to individually reposition lamellae which have worn. Thus, adjustment of the position of individual lamellae to compensate for wear, which may be non-ul~ir~llll across the holding rail is not possible, except to a very limited extent, by control of the respective adjustment screws.
SUMMARY OF THE INVENTION
It is an object to provide a ductor blade system which is so arranged that the lamella can be adjusted so that the entire ductor blade system will have a lifetime substantially in excess of that of the prior art structures.
Briefly, the lamellae are secured to the strip-like support elements in a way which permits both lon~ lin~l and lateral adjustment of the lamellae with respect to the strip-like support elements, so that the rOl ~Nard edge or end of the ductor blade lamellae can be placed in predetermined position with respect to a reference, for example the surface of the roller. This permits compensation for wear of the forward edge or end of the respective lamellae over a wide adjustment range, much wider than that possible by engagement with the individual lamellae with an adjustment screw, and hence substantially extends the lifetime of the entire ductor blade arrangement or system.
TITLE OF THE INVENTION
DUCTOR BLADE ~Y~
FIELD OF THE INVENTION
This invention relates to a ductor blade system, and more particularly to a ductor blade which is formed of a plurality of lamellae, suitable for use in the inker of a printing m~ine, to strip ink from a ductor roller or the like.
BACKGROUND OF THE INVENTION
Various types of printing m~chin~s use inkers which include a ductor roller, dipping into, or otherwise receiving ink from an ink supply. The amount of ink on the ductor roller is controlled by eng~ging a ductor blade against the ductor roller, to strip ink therefrom. The ductor blade may include a plurality of projecting, resilient lamellae, the position of which with respect to the roller can be changed by suitable adjustment arrangements, for example adjustment screws.
German Patent No. 36 13 806 describes a ductor blade arrangement in which thin elastic plates, forming lamellae, are located adjacent each other, and secured, in common, to a receiving or support portion. The receiving or support portion is in turn connected, by example by a screw connection, to a support rail or the like on the inker of the printing m~rlline.
B
The respective lamellae are, each, attached by a screw which passes through a circular hold, for example punched into the lamellae. The position of the lamellae, with respect to the roller, thus, is determined by the position of the hole and the screw passing therethrough. The arrangement does not permit adjustment of the lamellae with respect to the roller, individually, or to individually reposition lamellae which have worn. Thus, adjustment of the position of individual lamellae to compensate for wear, which may be non-ul~ir~llll across the holding rail is not possible, except to a very limited extent, by control of the respective adjustment screws.
SUMMARY OF THE INVENTION
It is an object to provide a ductor blade system which is so arranged that the lamella can be adjusted so that the entire ductor blade system will have a lifetime substantially in excess of that of the prior art structures.
Briefly, the lamellae are secured to the strip-like support elements in a way which permits both lon~ lin~l and lateral adjustment of the lamellae with respect to the strip-like support elements, so that the rOl ~Nard edge or end of the ductor blade lamellae can be placed in predetermined position with respect to a reference, for example the surface of the roller. This permits compensation for wear of the forward edge or end of the respective lamellae over a wide adjustment range, much wider than that possible by engagement with the individual lamellae with an adjustment screw, and hence substantially extends the lifetime of the entire ductor blade arrangement or system.
-3- ~Q ~
BRIEF DESCRIPI ION OF THE DRAWINGS
FIGURE 1 is a schematic top view of the ductor blade system;
FIGURE 2 is a top view of a lamella in accordance with the present invention, for use in the system;
FIGURE 2a is a fragmentary view of another form of the lamella, suitable for use in the system; and FIGURE 3 is a broken or offset section along line I-I of Figure 1.
DETAILED DESCRIPIION OF THE PREFERRED EMBODIMENTS
The general arrangement of the ductor blade system is best seen in Figure 1.
A plurality of lamellae or tongues 1 are located next to each other, each one of them being secured by screws 2 and 3 on a strip-like carrier element 4, which can be a carrier rail. The carrier element 4 (see Figure 3), in turn, can be attached to a transverse support element 7, forming part of the printing m~r11ine. A backing or underlay 41 is placed between the screws 2, 3 and the rail 4. It is an accessory aid in assembly in order to prevent twisting of the tongues when the screws 2, 3 are tightened. The components 1, 2, 3, 4 and 41, together, form the ductor blade system or assembly 5. The ductor blade assembly 5 is secured by screws 6 to the inker, for example an ink through 7. Adjustment screws 13, likewise forming part of the inker, and shown only schem~tir,~lly in Figure 3, engage the ductor blade lamellae 1 for fine adjustment.
B
BRIEF DESCRIPI ION OF THE DRAWINGS
FIGURE 1 is a schematic top view of the ductor blade system;
FIGURE 2 is a top view of a lamella in accordance with the present invention, for use in the system;
FIGURE 2a is a fragmentary view of another form of the lamella, suitable for use in the system; and FIGURE 3 is a broken or offset section along line I-I of Figure 1.
DETAILED DESCRIPIION OF THE PREFERRED EMBODIMENTS
The general arrangement of the ductor blade system is best seen in Figure 1.
A plurality of lamellae or tongues 1 are located next to each other, each one of them being secured by screws 2 and 3 on a strip-like carrier element 4, which can be a carrier rail. The carrier element 4 (see Figure 3), in turn, can be attached to a transverse support element 7, forming part of the printing m~r11ine. A backing or underlay 41 is placed between the screws 2, 3 and the rail 4. It is an accessory aid in assembly in order to prevent twisting of the tongues when the screws 2, 3 are tightened. The components 1, 2, 3, 4 and 41, together, form the ductor blade system or assembly 5. The ductor blade assembly 5 is secured by screws 6 to the inker, for example an ink through 7. Adjustment screws 13, likewise forming part of the inker, and shown only schem~tir,~lly in Figure 3, engage the ductor blade lamellae 1 for fine adjustment.
B
- 4 ~
Each one of the ductor blade lamellae 1, see Figure 2, or 1 a, see Figure 2a, isformed as resilient, springy, essentially rectangular plates. In accordance with a feature of the invention, the region in which the lamellae 1 are secured to the support strip or carrier 4 is formed with an elongated opening, opening 8 in Figure 2, and the open slot 8a in Figure 2a. The width of the opening 8, or the slot 8a, respectively, is so selected that the screws 2 and 3 can readily pass through the opening 8, 8a, without, however, defining a predetermined lateral position. The length of the opening 8, Figure 2, is shorter than the distance between the screws 3 and the fol ~rd edge of the rail element 4, so that, even if the lamella 1 is moved to its extreme forward position, the opening 8, or 8a, respectively, is always covered by the rol~d edge of the carrier strip 4. In accordance with the embodiment of Figure 2a, the elongated opening extends to the rear edge lb of the lamella, to form an open slit. One, each, recess 9 of a lamella and an equal recess 10 of an adjacent lamella form, together, an elongated recess through which a screw 6 to attach the rail 4 to the ink trough system 7 may pass.
The arrangement of Figure 1 is seen in cross-section in Figure 3, and it is to be noted that the section line is angled off between the opening for screw 3 and the recesses 9, 10 of adjacent lamellae for screws 6. As can be seen from Figure 3, the assembly 5 is engaged against a roller 11, dipping into ink within an ink trough system 7, as well know.
The thickness of the film on roller 11 can be adjusted by a screw 13, shown onlysymbolically, to control the spacing of the front edge 12 from the roller 11. Minor adjustments due to wear can also be carried out by screw 13, although substantial wear can B
Each one of the ductor blade lamellae 1, see Figure 2, or 1 a, see Figure 2a, isformed as resilient, springy, essentially rectangular plates. In accordance with a feature of the invention, the region in which the lamellae 1 are secured to the support strip or carrier 4 is formed with an elongated opening, opening 8 in Figure 2, and the open slot 8a in Figure 2a. The width of the opening 8, or the slot 8a, respectively, is so selected that the screws 2 and 3 can readily pass through the opening 8, 8a, without, however, defining a predetermined lateral position. The length of the opening 8, Figure 2, is shorter than the distance between the screws 3 and the fol ~rd edge of the rail element 4, so that, even if the lamella 1 is moved to its extreme forward position, the opening 8, or 8a, respectively, is always covered by the rol~d edge of the carrier strip 4. In accordance with the embodiment of Figure 2a, the elongated opening extends to the rear edge lb of the lamella, to form an open slit. One, each, recess 9 of a lamella and an equal recess 10 of an adjacent lamella form, together, an elongated recess through which a screw 6 to attach the rail 4 to the ink trough system 7 may pass.
The arrangement of Figure 1 is seen in cross-section in Figure 3, and it is to be noted that the section line is angled off between the opening for screw 3 and the recesses 9, 10 of adjacent lamellae for screws 6. As can be seen from Figure 3, the assembly 5 is engaged against a roller 11, dipping into ink within an ink trough system 7, as well know.
The thickness of the film on roller 11 can be adjusted by a screw 13, shown onlysymbolically, to control the spacing of the front edge 12 from the roller 11. Minor adjustments due to wear can also be carried out by screw 13, although substantial wear can B
-5- 7 ~
be compensated best by removing the rail 4, and readjusting the position of the front edge 12 of the individual lamellae with respect to a reference.
When the lamellae 1, la are worn, the ductor blade system 5 is loosened and then removed from the ink trough 7, by loosening and removing screws 6. Thereafter, screws 2 and 3 are loosened and the lamellae are adjusted to a position in which they are perpendicular to the axis of rotation of roller 11, with the rOl ~1vard edges 12 of the lamella in a predetermined starting position.
The system in accordance with the present invention has the advantage that the position of the lamellae 1 can be adjusted even if adjustment by the screws 13 is no longer possible. Thus, the lamellae can be repositioned and readjusted as desired. The flexible portion of a ductor blade system, namely the lamellae, is comparatively expensive. The present invention, thus, permits substantially longer use of the lamellae, and hence of the ductor blade system as a whole than heretofore, and represents a substantial saving in operating expenses and also in maintenance expenses of printing m~rhine inkers.
Various changes and modifications may be made within the scope of the inventive concept.
B
be compensated best by removing the rail 4, and readjusting the position of the front edge 12 of the individual lamellae with respect to a reference.
When the lamellae 1, la are worn, the ductor blade system 5 is loosened and then removed from the ink trough 7, by loosening and removing screws 6. Thereafter, screws 2 and 3 are loosened and the lamellae are adjusted to a position in which they are perpendicular to the axis of rotation of roller 11, with the rOl ~1vard edges 12 of the lamella in a predetermined starting position.
The system in accordance with the present invention has the advantage that the position of the lamellae 1 can be adjusted even if adjustment by the screws 13 is no longer possible. Thus, the lamellae can be repositioned and readjusted as desired. The flexible portion of a ductor blade system, namely the lamellae, is comparatively expensive. The present invention, thus, permits substantially longer use of the lamellae, and hence of the ductor blade system as a whole than heretofore, and represents a substantial saving in operating expenses and also in maintenance expenses of printing m~rhine inkers.
Various changes and modifications may be made within the scope of the inventive concept.
B
Claims (9)
1. Ductor blade system for controlling a film of liquid on a roller (11) dipping into an ink duct of a web-fed printing press, having a strip-like support element (4);
a plurality of elongated spring lamellae (1, 1a) secured to the strip-like support element (4) and positioned adjacent each other to project therefrom, towards the roller;
said lamellae each defining a forward end (12) facing the roller (11), and comprising, in accordance with the invention, means (2, 3, 8, 8a) for securing the lamellae (1) to said strip-like support element (4) and permitting longitudinal adjustment of the lamellae with respect to the striplike element to place said forward end (12) in a predetermined position with respect to a reference, optionally with respect to said roller (11), while permitting compensation for wear of said forward end;
and means (13) to enable them to be separately best out resiliently at right angles to their longitudinal plane to thereby adjust the spacing of their forward ends 12 with respect to the roller and hence the thickness of the film on the roller.
a plurality of elongated spring lamellae (1, 1a) secured to the strip-like support element (4) and positioned adjacent each other to project therefrom, towards the roller;
said lamellae each defining a forward end (12) facing the roller (11), and comprising, in accordance with the invention, means (2, 3, 8, 8a) for securing the lamellae (1) to said strip-like support element (4) and permitting longitudinal adjustment of the lamellae with respect to the striplike element to place said forward end (12) in a predetermined position with respect to a reference, optionally with respect to said roller (11), while permitting compensation for wear of said forward end;
and means (13) to enable them to be separately best out resiliently at right angles to their longitudinal plane to thereby adjust the spacing of their forward ends 12 with respect to the roller and hence the thickness of the film on the roller.
2. The system of claim 1, wherein said liquid comprises printing ink, and said roller is a roller of a printing machine.
3. The system of claim 1, wherein said means for securing the lamellae while permitting longitudinal adjustment comprises an elongated opening (8, 8a) in each of the lamellae in a region covered by said elongated strip (4), and screw means (2, 3) passing through said elongated opening.
4. The system of claim 3, wherein said elongated opening is an elongated hole.
5. The system of claim 3, wherein said elongated opening is an elongated slot terminating at an end portion of the lamellae remote from said forward end.
6. The system of claim 3, wherein the length of the elongated opening (8, 8a) in the lamellae is shorter than the distance between an edge of said support element (4) facing said roller (11) and a screw (3) forming part of said screw means remote from the roller (11).
7. The system of claim 1, wherein each one of the lamellae is formed with lateral recesses (9, 10) at the longitudinal sides thereof.
8. The system of claim 3, wherein each one of the lamellae is formed with lateral recesses (9, 10) at the longitudinal sides thereof; and wherein said longitudinal recesses, essentially, are located in the same region as said elongated openings (8, 8a).
9. The system of claim 1 wherein said means (13) comprises adjustment screws secured to said support element and bearing against portions of the lamellae.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9004747U DE9004747U1 (en) | 1990-04-26 | 1990-04-26 | Colorimeter arrangement |
| DEG9004747.8 | 1990-04-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2041116A1 CA2041116A1 (en) | 1991-10-27 |
| CA2041116C true CA2041116C (en) | 1999-04-20 |
Family
ID=6853244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002041116A Expired - Lifetime CA2041116C (en) | 1990-04-26 | 1991-04-24 | Doctor blade system |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0453872B1 (en) |
| JP (1) | JP3046091B2 (en) |
| CA (1) | CA2041116C (en) |
| DE (2) | DE9004747U1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9109785U1 (en) * | 1991-08-07 | 1992-09-17 | J.M. Voith Gmbh, 7920 Heidenheim | Squeegee device with squeegee bar |
| DE4240642C2 (en) * | 1992-12-03 | 1996-03-21 | Koenig & Bauer Albert Ag | Ink knife blade holder and ink knife blades for an ink fountain of a rotary printing press |
| DE29807941U1 (en) * | 1998-05-04 | 1999-09-09 | MAN Roland Druckmaschinen AG, 63075 Offenbach | Doctor device |
| DE19910989A1 (en) * | 1999-03-11 | 2000-09-14 | Heidelberger Druckmasch Ag | Doctor blade assembly for ink supply in rotary printing machines has several segments connected side by side on support bar with positive locking connection between contact faces |
| EP1034926B1 (en) | 1999-03-11 | 2003-10-08 | Heidelberger Druckmaschinen Aktiengesellschaft | Segmented duct blade device in an ink supply apparatus |
| DE102013225691B4 (en) * | 2013-12-12 | 2017-11-16 | Koenig & Bauer Ag | A system for feeding and metering ink into an inking unit of a printing machine and method for renewing a metering edge effective for color metering |
| DE102023135190A1 (en) * | 2023-12-14 | 2025-06-18 | TKM Meyer GmbH | Squeegee device of a gravure printing machine and method for adjusting the effective stiffness of a squeegee |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE235768C (en) * | ||||
| US1574474A (en) * | 1924-04-22 | 1926-02-23 | Faltus Edward | Printing-press ink fountain |
| FR2221280A1 (en) * | 1973-03-16 | 1974-10-11 | De La Rue Giori Sa | |
| DE2951653C2 (en) * | 1979-12-21 | 1983-04-14 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | Device for dosing ink on the ink fountain roller of an inking unit for printing machines |
| DD155850A3 (en) * | 1980-04-15 | 1982-07-14 | Regina Wege | COLOR WORK FOR PRINTING MACHINES |
| DE3018784C2 (en) * | 1980-05-16 | 1982-12-16 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Ink metering device in an ink box for offset or letterpress machines |
| DE3026666A1 (en) * | 1980-06-19 | 1981-12-24 | Color Metal AG, 8045 Zürich | Printing press ink metering system - has wedge shaped bladed moved to and from ink transfer cylinder |
| DE3613806A1 (en) * | 1986-04-24 | 1987-10-29 | Steuber Heinrich | Ink knife arrangement |
| CH677211A5 (en) * | 1988-05-31 | 1991-04-30 | Bobst Sa |
-
1990
- 1990-04-26 DE DE9004747U patent/DE9004747U1/en not_active Expired - Lifetime
-
1991
- 1991-04-10 EP EP91105671A patent/EP0453872B1/en not_active Expired - Lifetime
- 1991-04-10 DE DE59107221T patent/DE59107221D1/en not_active Expired - Lifetime
- 1991-04-24 CA CA002041116A patent/CA2041116C/en not_active Expired - Lifetime
- 1991-04-25 JP JP3095073A patent/JP3046091B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59107221D1 (en) | 1996-02-22 |
| JP3046091B2 (en) | 2000-05-29 |
| EP0453872B1 (en) | 1996-01-10 |
| DE9004747U1 (en) | 1990-06-28 |
| JPH04226361A (en) | 1992-08-17 |
| EP0453872A1 (en) | 1991-10-30 |
| CA2041116A1 (en) | 1991-10-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |