GB434422A - Improvements relating to printing presses - Google Patents
Improvements relating to printing pressesInfo
- Publication number
- GB434422A GB434422A GB637834A GB637834A GB434422A GB 434422 A GB434422 A GB 434422A GB 637834 A GB637834 A GB 637834A GB 637834 A GB637834 A GB 637834A GB 434422 A GB434422 A GB 434422A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder
- printing
- grippers
- bar
- gap
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F21/00—Devices for conveying sheets through printing apparatus or machines
- B41F21/04—Grippers
Landscapes
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Abstract
434,422. Printing-machines. HAWARD, E. W., 2, Tudor Mansions, Church Road, Hendon, and HAWARD GRAVURE MACHINE CO., Ltd., 1, Broad Street Place, Blomfield Street, both in London. Feb. 27, 1934, No. 6378. [Class 100 (ii)] Gripper mechanism.-In connection with rotary printing-presses in which the impression cylinder a is moved to and from the printing - cylinder between successive impressions, the grippers are constructed, so as to be capable of dealing with sheets of different thicknesses, of spring- controlled members b, coacting with a gripper bar e which is spring- mounted and is capable of being withdrawn into the cylinder a as the grippers move past the printing-cylinder. The bar e extends laterally beyond the periphery of the cylinder a and is formed with cam surfaces extending a slight distance radially beyond this periphery, and at the commencement of the printing operation the surfaces j engage cam surfaces on the printing-cylinder or the machine frame in order to withdraw the grippers into the gap in the cylinder a to prevent the fouling of the grippers with the printing-surface of the printing-cylinder. In Fig. 2 the bar e is pressed outwards by a spring i and it is formed with an enlarged head f which has a limited play in a recess g formed in part by a recess in the rear end wall of the gap in the cylinder and in part by a recessed guide member h secured by bolts to the bottom of the gap. In a modification, Fig. 4, the bar e is guided by a plate m secured to the rear end wall of the cylinder gap by screws n which pass through slots in the bar e. The grippers b close under the action of extension springs d, Fig. 2, or a torsion spring o, Fig. 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB637834A GB434422A (en) | 1934-02-27 | 1934-02-27 | Improvements relating to printing presses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB637834A GB434422A (en) | 1934-02-27 | 1934-02-27 | Improvements relating to printing presses |
Publications (1)
Publication Number | Publication Date |
---|---|
GB434422A true GB434422A (en) | 1935-08-27 |
Family
ID=9813405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB637834A Expired GB434422A (en) | 1934-02-27 | 1934-02-27 | Improvements relating to printing presses |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB434422A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2496555A1 (en) * | 1980-12-24 | 1982-06-25 | Roland Man Druckmasch | PRINTING CYLINDER FOR ROTOGRAVIDE PRESS |
DE102004030142A1 (en) * | 2004-06-22 | 2006-01-19 | Heidelberger Druckmaschinen Ag | Method for the secure operation of a printing machine and printing machine for carrying out the method |
US7412927B2 (en) | 2004-06-22 | 2008-08-19 | Heidelberger Druckmaschinen Ag | Printing machine with gripper retraction mechanism for safe operation of the printing machine |
-
1934
- 1934-02-27 GB GB637834A patent/GB434422A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2496555A1 (en) * | 1980-12-24 | 1982-06-25 | Roland Man Druckmasch | PRINTING CYLINDER FOR ROTOGRAVIDE PRESS |
DE102004030142A1 (en) * | 2004-06-22 | 2006-01-19 | Heidelberger Druckmaschinen Ag | Method for the secure operation of a printing machine and printing machine for carrying out the method |
US7412927B2 (en) | 2004-06-22 | 2008-08-19 | Heidelberger Druckmaschinen Ag | Printing machine with gripper retraction mechanism for safe operation of the printing machine |
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