GB865103A - Improvements in or relating to rotary printing machines - Google Patents

Improvements in or relating to rotary printing machines

Info

Publication number
GB865103A
GB865103A GB3177758A GB3177758A GB865103A GB 865103 A GB865103 A GB 865103A GB 3177758 A GB3177758 A GB 3177758A GB 3177758 A GB3177758 A GB 3177758A GB 865103 A GB865103 A GB 865103A
Authority
GB
United Kingdom
Prior art keywords
roller
cam
sheet
clamping
bracket
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
Application number
GB3177758A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Davidson Corp
Original Assignee
Davidson Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US865103XA priority Critical
Application filed by Davidson Corp filed Critical Davidson Corp
Publication of GB865103A publication Critical patent/GB865103A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41LAPPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L11/00Apparatus for directly duplicating from hectographic masters in mirror image, i.e. "wet duplicators" for producing positive copies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41LAPPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L29/00Devices for attaching printing elements or formes to supports

Abstract

865,103. Rotary printing machines; printing surfaces. DAVIDSON CORPORATION. Oct. 6, 1958 [Oct. 29, 1957], No. 31777/58. Class 100(2) A rotary printing press 10 includes a cylinder 11 having a peripheral slot 14 disposed parallel to the cylinder axis and a clamping device 15 secured in the slot for gripping the leading edge of a flexible sheet, the clamping device 15 comprising a supporting bracket 18, a clamping member 24 pivotally supported in the bracket, means for locking and unlocking the member 24 to and from sheet clamping position, and cam actuated means for pivoting the member from a sheet clamping position. The machine 10 may be as described in Specification 746,128 and has a plate-platen cylinder 11 and offset cylinder 12 mounted between frames 13. The clamping device 15 for the master sheets is identical to the device 17 provided for the copy sheets. The bracket 18 is fastened to the wall 19 of slot 14 and has a stop portion 22, against which the sheet to be clamped is positioned, and an anvil portion 23 against which the sheet is held by the gripper member 24 pivotally journalled on a rod 25 itself pivotally journalled in end pieces 18a of the bracket 18. The member 24 comprises gripper fingers 27 that extend between the stops 22. The fingers 27 are normally spring-biased into sheet gripping position. An ejector strip 30 is fastened to arms 31 pivotally secured to bracket 18 at 32. The strip 30 is connected by springs 34 to the member 24 so that as the latter moves out of clamping position the strip 30 is urged upwardly. Rigidly fastened to rod 25 is a link 35 having a roller 36 which co-operates with cams 55, 63 fixed to the machine frames and which may be moved from an inoperative to a roller contacting position. Also fastened to rod 25 is an arm 38 carrying a cam 37 which co-operates with a roller 39 on a lever 40. The roller 39 is spring biased into engagement with the cam 37 and the lever 40 is pivoted between legs 44 extending from the bracket 18. Lever 40 also carries a roller 46 adapted to abut against the flat head 50 of a screw 49 provided in an arm 26 of the member 24. Arm 26 is connected to cam 37 by a pin and slot connection 47, 48. The member 24 is locked in clamping position during printing by the action of roller 46 on the flat head 50. In operation as the cylinder 11 is brought round to the feed station 58 of the station roller 36 contacts cam 55 thus pivoting cam 37 in a sense to raise roller 39 from its position abutting flat head 50 so that the clamp 24 is no longer locked. During this initial movement the clamp 24 does not move owing to the slot 48. Further pivotal movement of cam 37 however raises the clamp 24 sufficiently to allow a sheet to be inserted over the anvil 23 and under the fingers 27. During this operation lifting of the ejector strip 30 is prevented by a rise 62 on the arm 31. As the cylinder continues to rotate the roller 36 rides off cam 55 and the parts return to the position shown in Fig. 3. When the sheet is to be ejected the roller 36 contacts cam 63 the shape of which is such as to give a greater pivotal movement to cam 37 and thus cause lifting of the ejector strip 30 as well as of the clamp 24 and so lift the edge of the sheet for engagement by a stripper plate 65. The roller 36 only contacts the cams 55, 63 when these are moved into operative position. The roller on the clamp 17 for the copy sheets, however is made wider so that the cams 55, 63 are contacted during each cycle of the machine.
GB3177758A 1957-10-29 1958-10-06 Improvements in or relating to rotary printing machines Expired GB865103A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US865103XA true 1957-10-29 1957-10-29

Publications (1)

Publication Number Publication Date
GB865103A true GB865103A (en) 1961-04-12

Family

ID=22199046

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3177758A Expired GB865103A (en) 1957-10-29 1958-10-06 Improvements in or relating to rotary printing machines

Country Status (2)

Country Link
DE (1) DE1118807B (en)
GB (1) GB865103A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6854727B2 (en) * 2001-04-30 2005-02-15 Heidelberger Druckmaschinen Ag Device for knocking off sheet material

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3940795C2 (en) * 1989-12-09 1991-09-19 Koenig & Bauer Ag, 8700 Wuerzburg, De
DE3940796C2 (en) * 1989-12-09 1991-09-19 Koenig & Bauer Ag, 8700 Wuerzburg, De
JP3524472B2 (en) * 2000-05-17 2004-05-10 リョービ株式会社 Sheet-fed printing press

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE670132C (en) * 1930-07-17 1939-01-12 Leo Kluitmann Dr Rotary multiplier with an imprintable mirror writing original attached to a printing drum
DE702066C (en) * 1937-11-28 1941-01-30 Mailaender Fa J G Clamping of printing plates on rotary machines
DE918508C (en) * 1939-02-11 1954-09-27 Roto Werke Ag Device for automatic original change in rotary multipliers
US2288290A (en) * 1940-03-09 1942-06-30 Ditto Inc Sheet clamping means for duplicating machines
FR920206A (en) * 1945-12-29 1947-04-01 Harris Seybold Potter Co Sheet clamping mechanism
NL90158C (en) * 1953-02-24

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6854727B2 (en) * 2001-04-30 2005-02-15 Heidelberger Druckmaschinen Ag Device for knocking off sheet material

Also Published As

Publication number Publication date
DE1118807B (en) 1961-12-07

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