US3147697A - Inking cylinder - Google Patents
Inking cylinder Download PDFInfo
- Publication number
- US3147697A US3147697A US144121A US14412161A US3147697A US 3147697 A US3147697 A US 3147697A US 144121 A US144121 A US 144121A US 14412161 A US14412161 A US 14412161A US 3147697 A US3147697 A US 3147697A
- Authority
- US
- United States
- Prior art keywords
- ink
- cylinder
- chamber
- inking
- inking cylinder
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
- B41L13/00—Stencilling apparatus for office or other commercial use
- B41L13/18—Inking units
Definitions
- the cylinder is filled with ink which is adapted to pass through perforations in the cylinder onto an inking pad.
- the ink is adapted to pass from the pad through stencil openings in an adjacent stencil and then to a sheet to be printed.
- ink remains in the cylinder during periods of nonuse and leaking and dripping of ink has been a problem.
- the ink will, in some instances, seep into the ink pad and over the cylinder edges, even where the cylinder is positioned with the perforated side up. The situation is particularly noticeable where high humidity conditions are experienced.
- FIGURE l is a cross-sectional view of an inking cylinder provided with the improvements of this invention
- FIGURE 2 is a perspective view of an absorbent pad adapted for use in accordance with this invention.
- FIGURE 3 is a detail sectional view of ink collecting means which are incorporated with the inking cylinder for achieving the objects of this invention.
- FIGURE 4 is a fragmentary sectional view taken about the line 4 4 of FIGURE l.
- the concepts of this invention provide improvements in inking cylinders of the type which include a cylindrically curved, perforated portion for transfer of the ink from the cylinder reservoir to the ink pad.
- Elongated slots are formed in the cylinder adjacent the ends of the perforated portion for receipt of ink which tends to pass beyond the ends of the perforated portion and roll down into the mechanisms below.
- the slots formed in the cylinder surface open into an ink collecting chamber which extends within the cylinder and outlets are provided in the chamber for passage of ink back into the ink reservoir.
- means are provided within the chamber for facilitating the passage of ink into the chamber.
- Such means which may take the form of an absorbent pad or means having a capillary action with respect to the ink, are provided for contact with the ink pad to insure passage of the ink in the desired manner.
- FIGURE 1 illustrates in crosssection an inking cylinder having an ink tank or reser- 3,147,697 Patented Sept. 8, 1964 ICC voir 12 and a cylindrically curved portion 14. Perforations 16 are provided in the curved portion for passage of ink to an ink pad 18 which in turn will transmit ink through openings in a stencil 20 to produce copy.
- the stencil and ink pad may be secured to the cylinder in any suitable manner.
- the stud 22 and the guide pin 24 may serve to provide tensioning means of the type described in the United States patent to DuBois No. 2,916,990, issued December l5, 1959.
- Slots 26 are formed in the drum surface adjacent the ends of the perforated portion 14. The slots extend transversely of the cylinder and open into ink collecting chambers 28. Openings 30 are provided at the ends of the transversely elongated chamber for transferring ink collected into the cylinder reservoir.
- the means 32 for absorbing or otherwise aiding in the collection of ink.
- the means 32 can be composed of any material capable of collecting the ink from the pad 13 and aiding in transferring the ink back into the ink reservoir.
- the felt pad shown in FIGURE 2 can comprise the means 32, the felt serving to absorb any ink soaking through the ink pad and tending to drip over the edges of the cylinder. It Will be noted that the edge 34 of the pad is tapered whereby this edge will be flush with the surface of the cylinder. With this design the ink pad will directly contact the means 32 and more eflicient drawing of ink into the chamber will be accomplished.
- suitable felt composions include white felt, designated American Felt No. 51,018 and gray-black felt, designated Rhopac No. 30,103.
- Various other means can be employed for aiding in drawing ink into the chamber 28.
- These means can be porous compositions adapted to absorb the ink or they may include various laminated constructions having passages between the laminations for drawing in the ink by capillary action.
- corrugated materials can be laminated to provide suitable passages or a plurality of closely spaced straw-like members with capillary passages could be employed.
- suitable ink collecting means include laminated olf-set clean-up materials and laminated blotter material, such constructions providing an absorbing as Well as a capillary action in use.
- Various open cell foam materials having interconnected pores include 5 pound charcoal polyurethane foam, 45 pore polyurethane foam and l0 pore polyurethane foam.
- the ink collecting means disposed in the chamber 2S can also be formed from a laminated plastic labyrinth employing various plastic compositions. E flute corrugated cardboard constructions are also useful for this purpose since the construction will provide a plurality of small passages through the chamber 28 whereby the ink will pass into the chamber by means of capillary action. A similar result is obtained when a plurality of vertically aligned straws, preferably relatively small straws with small passages, are used to make up the ink collecting construction. In any event, constructions which are formed from the various materials set forth or from equivalent materials should be designed so that the exposed end of the construction will be flush with the periphery of the cylinder whereby contact with the pad 18 is achieved.
- the inking cylinders which are modified in accordance with this invention has been operated over long periods without significant roll-down or leakage.
- Cylinders of the improved type described have been tested under the most adverse conditions of humidity without experiencing the objectionable leakage.
- Ink pads when provided on cylinders of the improved type, readily give up the ink which saturates them after a printing operation to the collecting means of this invention, and the ink is thus passed into the cylinder reservoir without dripping onto other parts of the printing mechanism.
- an inking cylinder for a rnimeograph machine in which the inking cylinder includes a rigid cylindrical curved perforated portion and an ink pad extending continuously over said curved portion and secured at the ends thereof to the inking cylinder, the improvement comprising an attachment secured to the underside of the inking cylinder adjacent the ends of said curved portion to define an enclosed collecting chamber therebetween, elongate slots extending through the end portions of the curved portion into communication with said chambers for passage of ink through said cylinder into said charnbers, openings in said attachment communicating the chamber with the ink well within said inking cylinder for passage of ink from the chamber into the ink well, and an absorbent member lling the chamber for drawing ink from the cylinder into the chamber through said slots, said rigid cylindrical curved portion of the cylinder extending beyond the chambers to provide a continuous rigid support for the portions of the ink pad overlying the chambers.
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Description
Sept 3 1964 G. J. ZAHRADNIK 3,147,697
INKING CYLINDER Filed 001). l0, 1961 FIG.
INVENTR. George J.' Zakradmk United States Patent O 3,147,697 ING CYLINDER George I. Zahradnik, North Riverside, Ill., assignor to A. B. Dick Company, Chicago, Ill., a corporation of Illinois Filed Oct. 10, 1961, Ser. No. 144,121 4 Claims. (Cl. 101-119) This invention relates to improvements in inking cylinders such as the type of cylinders which are employed in stencil duplicating machines.
In inking cylinders which are employed in mimeograph operations, the cylinder is filled with ink which is adapted to pass through perforations in the cylinder onto an inking pad. During a duplicating cycle, the ink is adapted to pass from the pad through stencil openings in an adjacent stencil and then to a sheet to be printed.
On many occasions ink remains in the cylinder during periods of nonuse and leaking and dripping of ink has been a problem. The ink will, in some instances, seep into the ink pad and over the cylinder edges, even where the cylinder is positioned with the perforated side up. The situation is particularly noticeable where high humidity conditions are experienced.
There are other occasions where an ink pad becomes saturated with ink or Where the ink otherwise leaks from the cylinder and rolls down. It will be obvious that the presence of ink on the mechanisms below the cylinder is undesirable and it is extremely difficult to accomplish cleaning in this area of the machine.
It is, therefore, an object of this invention to provide an improved inking cylinder which is not subject to the problems of roll-down and leakage of ink.
It is a further object of this invention to provide an improved inking cylindeiwhich includes means for collecting ink which tends to roll down from the cylinder and leak into the housing of the duplicating machine.
These and other objects of this invention will appear hereinafter and for purposes of illustration, but not of limitation, specific embodiments are shown in the accompanying drawings in which* FIGURE l is a cross-sectional view of an inking cylinder provided with the improvements of this invention;
FIGURE 2 is a perspective view of an absorbent pad adapted for use in accordance with this invention;
FIGURE 3 is a detail sectional view of ink collecting means which are incorporated with the inking cylinder for achieving the objects of this invention; and
FIGURE 4 is a fragmentary sectional view taken about the line 4 4 of FIGURE l.
The concepts of this invention provide improvements in inking cylinders of the type which include a cylindrically curved, perforated portion for transfer of the ink from the cylinder reservoir to the ink pad. Elongated slots are formed in the cylinder adjacent the ends of the perforated portion for receipt of ink which tends to pass beyond the ends of the perforated portion and roll down into the mechanisms below.
The slots formed in the cylinder surface open into an ink collecting chamber which extends within the cylinder and outlets are provided in the chamber for passage of ink back into the ink reservoir. In a preferred form of the invention means are provided within the chamber for facilitating the passage of ink into the chamber. Such means, which may take the form of an absorbent pad or means having a capillary action with respect to the ink, are provided for contact with the ink pad to insure passage of the ink in the desired manner.
The accompanying drawings and the following related explanation will provide a more specific description of the inventive concepts. FIGURE 1 illustrates in crosssection an inking cylinder having an ink tank or reser- 3,147,697 Patented Sept. 8, 1964 ICC voir 12 and a cylindrically curved portion 14. Perforations 16 are provided in the curved portion for passage of ink to an ink pad 18 which in turn will transmit ink through openings in a stencil 20 to produce copy.
The stencil and ink pad may be secured to the cylinder in any suitable manner. For example, the stud 22 and the guide pin 24 may serve to provide tensioning means of the type described in the United States patent to DuBois No. 2,916,990, issued December l5, 1959.
In a preferred form of the invention there are provided within the chambers 28 means 32 for absorbing or otherwise aiding in the collection of ink. The means 32 can be composed of any material capable of collecting the ink from the pad 13 and aiding in transferring the ink back into the ink reservoir. For example, the felt pad shown in FIGURE 2 can comprise the means 32, the felt serving to absorb any ink soaking through the ink pad and tending to drip over the edges of the cylinder. It Will be noted that the edge 34 of the pad is tapered whereby this edge will be flush with the surface of the cylinder. With this design the ink pad will directly contact the means 32 and more eflicient drawing of ink into the chamber will be accomplished. Speciic examples of suitable felt composions include white felt, designated American Felt No. 51,018 and gray-black felt, designated Rhopac No. 30,103.
Various other means can be employed for aiding in drawing ink into the chamber 28. These means can be porous compositions adapted to absorb the ink or they may include various laminated constructions having passages between the laminations for drawing in the ink by capillary action. Thus, corrugated materials can be laminated to provide suitable passages or a plurality of closely spaced straw-like members with capillary passages could be employed.
Additional more specific examples of suitable ink collecting means include laminated olf-set clean-up materials and laminated blotter material, such constructions providing an absorbing as Well as a capillary action in use. Various open cell foam materials having interconnected pores include 5 pound charcoal polyurethane foam, 45 pore polyurethane foam and l0 pore polyurethane foam.
The ink collecting means disposed in the chamber 2S can also be formed from a laminated plastic labyrinth employing various plastic compositions. E flute corrugated cardboard constructions are also useful for this purpose since the construction will provide a plurality of small passages through the chamber 28 whereby the ink will pass into the chamber by means of capillary action. A similar result is obtained when a plurality of vertically aligned straws, preferably relatively small straws with small passages, are used to make up the ink collecting construction. In any event, constructions which are formed from the various materials set forth or from equivalent materials should be designed so that the exposed end of the construction will be flush with the periphery of the cylinder whereby contact with the pad 18 is achieved.
The inking cylinders which are modified in accordance with this invention has been operated over long periods without significant roll-down or leakage. Cylinders of the improved type described have been tested under the most adverse conditions of humidity without experiencing the objectionable leakage. Ink pads, when provided on cylinders of the improved type, readily give up the ink which saturates them after a printing operation to the collecting means of this invention, and the ink is thus passed into the cylinder reservoir without dripping onto other parts of the printing mechanism. y
It will be understood that various modifications may be made in the above described inking cylinders which provide the characteristics of this invention without departing from the spirit thereof, particularly as dened in the following claims.
I claim:
l. In an inking cylinder for a rnimeograph machine in which the inking cylinder includes a rigid cylindrical curved perforated portion and an ink pad extending continuously over said curved portion and secured at the ends thereof to the inking cylinder, the improvement comprising an attachment secured to the underside of the inking cylinder adjacent the ends of said curved portion to define an enclosed collecting chamber therebetween, elongate slots extending through the end portions of the curved portion into communication with said chambers for passage of ink through said cylinder into said charnbers, openings in said attachment communicating the chamber with the ink well within said inking cylinder for passage of ink from the chamber into the ink well, and an absorbent member lling the chamber for drawing ink from the cylinder into the chamber through said slots, said rigid cylindrical curved portion of the cylinder extending beyond the chambers to provide a continuous rigid support for the portions of the ink pad overlying the chambers.
2. An inking cylinder according to claim l wherein said collecting means comprise felt pads.
3. An inking cylinder according to claim l wherein said collecting means comprise laminated pads.
4. An inking cylinder according to claim l wherein said collecting means comprise an open cell foam material.
References Cited in the le of this patent UNITED STATES PATENTS 2,612,834 Sherman Oct. 7, 1952 FOREIGN PATENTS 402,240 Great Britain Nov. 30, 1933
Claims (1)
1. IN AN INKING CYLINDER FOR A MIMEOGRAPH MACHINE IN WHICH THE INKING CYLINDER INCLUDES A RIGID CYLINDRICAL CURVED PERFORATED PORTION AND AN INK PAD EXTENDING CONTINOUSLY OVER SAID CURVED PORTION AND SECURED AT THE ENDS THEREOF TO THE INKING CYLINDER, THE IMPROVEMENT COMPRISING AN ATTACHMENT SECURED TO THE UNDERSIDE OF THE INKING CYLINDER ADJACENT THE ENDS OF SAID CURVED PORTION TO DEFINE AN ENCLOSED COLLECTING CHAMBER THEREBETWEEN, ELONGATE SLOTS EXTENDING THROUGH THE END PORTIONS OF THE CURVED PORTION INTO COMMUNICATION WITH SAID CHAMBERS FOR PASSAGE OF INK THROUGH SAID CYLINDER INTO SAID CHAMBERS, OPENINGS IN SAID ATTACHMENT COMMUNICATING THE CHAMBER WITH THE INK WELL WITHIN SAID INKING CYLINDER FOR PASSAGE OF INK FROM THE CHAMBER INTO THE INK WELL, AND AN ABSORBENT MEMBER FILLING THE CHAMBER FOR DRAWING INK FROM THE CYLINDER INTO THE CHAMBER THROUGH SAID
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US144121A US3147697A (en) | 1961-10-10 | 1961-10-10 | Inking cylinder |
GB36908/62A GB1019903A (en) | 1961-10-10 | 1962-09-28 | Improvements in or relating to inking cylinders |
FR911357A FR1335457A (en) | 1961-10-10 | 1962-10-05 | Ink cylinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US144121A US3147697A (en) | 1961-10-10 | 1961-10-10 | Inking cylinder |
Publications (1)
Publication Number | Publication Date |
---|---|
US3147697A true US3147697A (en) | 1964-09-08 |
Family
ID=22507148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US144121A Expired - Lifetime US3147697A (en) | 1961-10-10 | 1961-10-10 | Inking cylinder |
Country Status (3)
Country | Link |
---|---|
US (1) | US3147697A (en) |
FR (1) | FR1335457A (en) |
GB (1) | GB1019903A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2506220A1 (en) * | 1981-05-22 | 1982-11-26 | Gestetner Mfg Ltd | MULTI-CYLINDER STENCIL DUPLICATOR AND INK FRAME FOR USE THEREIN |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2927491B2 (en) * | 1990-03-06 | 1999-07-28 | 理想科学工業株式会社 | Stencil printing machine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB402240A (en) * | 1931-11-03 | 1933-11-30 | Carl Fr Brauer Ges Mit Beschra | Improvements in or relating to printing cylinders for stencil printing |
US2612834A (en) * | 1950-02-14 | 1952-10-07 | Herbert P Sherman | Duplicating machine |
-
1961
- 1961-10-10 US US144121A patent/US3147697A/en not_active Expired - Lifetime
-
1962
- 1962-09-28 GB GB36908/62A patent/GB1019903A/en not_active Expired
- 1962-10-05 FR FR911357A patent/FR1335457A/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB402240A (en) * | 1931-11-03 | 1933-11-30 | Carl Fr Brauer Ges Mit Beschra | Improvements in or relating to printing cylinders for stencil printing |
US2612834A (en) * | 1950-02-14 | 1952-10-07 | Herbert P Sherman | Duplicating machine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2506220A1 (en) * | 1981-05-22 | 1982-11-26 | Gestetner Mfg Ltd | MULTI-CYLINDER STENCIL DUPLICATOR AND INK FRAME FOR USE THEREIN |
Also Published As
Publication number | Publication date |
---|---|
FR1335457A (en) | 1963-08-16 |
GB1019903A (en) | 1966-02-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2226163A (en) | Multicolor plate printing tissues or other matters | |
US3678848A (en) | Inking pad and use thereof | |
US2464040A (en) | Dampening or moistening roller | |
US3147697A (en) | Inking cylinder | |
US4441422A (en) | Capillary stencil printer with improved replenishment of the printing pad and re-inking of the reservoir | |
US2775195A (en) | Method of dampening a lithographic plate or stone and a damping roller for use in that connection | |
US1938904A (en) | Stencil ink roller | |
US1531249A (en) | Stencil card | |
US2958146A (en) | Planographic printing | |
US2905085A (en) | Textile printing | |
US2086011A (en) | Stencil and inking device therefor | |
ATE35944T1 (en) | INKING OR DAMPENING UNIT FOR ROTARY PRINTING MACHINES. | |
US2072534A (en) | Duplicating machine and method | |
US3002449A (en) | Inking pad structure for a mimeograph duplicating machine | |
US416174A (en) | meriman | |
US2038706A (en) | Inking reel | |
US3844212A (en) | Covering for perforated inking drums of stencil printing machines | |
US3158095A (en) | Inking roller for a printing apparatus or the like | |
US3227073A (en) | Ink repellent inking pad and cover for stencil printing devices | |
US2022539A (en) | Rotary stencil printing apparatus | |
US3103879A (en) | Mimeograph hand printers | |
US1626323A (en) | Printing stencil and method of making same | |
US2510838A (en) | Inking pad | |
JPS5789987A (en) | Screen process printing device | |
US2165867A (en) | Device for printing designs on walls, surfaces, or the like |