US3536009A - Device for mounting flexible printing plates - Google Patents

Device for mounting flexible printing plates Download PDF

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Publication number
US3536009A
US3536009A US794306*A US3536009DA US3536009A US 3536009 A US3536009 A US 3536009A US 3536009D A US3536009D A US 3536009DA US 3536009 A US3536009 A US 3536009A
Authority
US
United States
Prior art keywords
plate
clamping
cylinder
arcuate
clamping jaw
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
Application number
US794306*A
Other languages
English (en)
Inventor
Josef Boehm
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.)
Schnellpressenfabrik Koenig and Bauer AG
Original Assignee
Schnellpressenfabrik Koenig and Bauer AG
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
Application filed by Schnellpressenfabrik Koenig and Bauer AG filed Critical Schnellpressenfabrik Koenig and Bauer AG
Application granted granted Critical
Publication of US3536009A publication Critical patent/US3536009A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
    • B41F27/1243—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by pivotal or swivelling motion, e.g. by means of a rocking lever

Definitions

  • a lockup for a plate on a plate cylinder is provided. There are in the illustration, two slots in the plate cylinder one for each end of an arcuate plate being mounted. A first clamping jaw extends in one of the slots and is mounted for pivotal movement about a shaft within the plate cylinder, This jaw has an integral lever arm with an adjusting screw threadedly received in the plate cylinder whereby turning the screw will pivot the clamping jaw.
  • first clamping jaw Cooperating with this first clamping jaw is a radially extending bar in the slot and a clamping element in the form of an elongated elastic cord.
  • One radially inwardly bent end of the arcuate plate is received between the first clamping jaw and the elastic cord.
  • the adjusting screw rotates the clamp to press the plate end against the elastic cord or release it from pressing against the elastic cord.
  • Another pivotally mounted clamping jaw in the other slot in the plate cylinder and it clamps the other radial inwardly bent end of the arcuate plate against another elastic cord that abuts another radially extending bar in this other slot.
  • This other lever arm has a compression spring mounted in the plate cylinder that presses continually against the lever arm of the second clamping jaw when an arcuate plate is locked up.
  • the compression spring in the system applies a bias force on the adjacent arcuate plate end,
  • Other pairs of such clamping jaws may be positioned about the plate cylinder. In the disclosure there are two diametrically positioned slots and two pairs of clamping jaws for two arcuate plates.
  • the invention relates to a device for mounting flexible printing plates onto plate cylinders of rotary printing presses by means of two clamping jaws arranged in a groove of the plate cylinder and counteracting parallel to the central shaft of the cylinder to the opposing clamping surfaces.
  • a device of this kind has become known by the German Pat. No. 1,265,164. It is suitable for clamping a flexible printing plate onto the plate cylinder the length of which corresponds approximately to the circumference of the plate cylinder.
  • each clamping jaw to be pressed against the clamping element extending along the clamping jaws which itself is resting against a bar extending over the entire plate width and being narrow in the circumferential direction of the printing plate and firmly connected to the plate cylinder.
  • the drawing shows a cross section through a plate cylinder on which two printing plates are mounted.
  • Two printing plates 2 and 4 are mounted on the plate cylinder 1. They are tightened by the clamping jaws 21, 22 and 41, 42. Between the clamping jaws 21 and 42 there are two clamping elements 23 and 44 elastic cord like shaped which are pressed onto the bar 45 by the action of the clamping jaws.
  • the bar 45 is mounted on plate cylinder 1.
  • the clampingjaws 22 are rocked about the shaft 26 by means of the adjusting screw 27 mounted at the lever 28.
  • the clamping jaw 21 operated by spring 29 which rocks it about shaft 31 by means of its lever arm 30.
  • spring 29 When operating adjusting screw 27 the elastic cord 24 is compressed and plate 2 is clamped. Owing to this, spring 29 is deformed.
  • plate 2 When tightening further the adjusting screw 27, plate 2 can be shifted in circumferential direction to the plate cylinder in and against the direction of action of the spring 29.
  • the parts of the lockup devices for plate 4 are designated with the numbers 41 to 51 according to the parts 21 to 31 for the lockup device for plate 2.
  • Apparatus for mounting a flexible arcuate plate having generally radial inwardly bent ends on a plate cylinder of a rotary printing press having at least a pair of slots therein for receiving said ends of the plate and extending parallel to the central shaft of the cylinder, a generally radially extending bar in each slot on the cylinder, a first clamping jaw pivotally mounted in the cylinder and extending in said slot, an attached lever arm on said first clamping jaw, a spring means mounted in the plate cylinder and urging said first clamping jaw towards the adjacent in bent end of said arcuate plate and against an elongated clamping element abutting said bar in said slot, a second clamping jaw extending in said second slot and pivotally mounted in said cylinder, a clamping element abutting the bar extending in said second slot, said second clamping jaw having an attached lever arm and an adjusting screw member threadedly received in the cylinder for rotating said second clamping jaw against the other inbent end of the arcuate plate that presses against said clamp

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
US794306*A 1968-02-15 1969-01-27 Device for mounting flexible printing plates Expired - Lifetime US3536009A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESC041980 1968-02-15

Publications (1)

Publication Number Publication Date
US3536009A true US3536009A (en) 1970-10-27

Family

ID=7436510

Family Applications (1)

Application Number Title Priority Date Filing Date
US794306*A Expired - Lifetime US3536009A (en) 1968-02-15 1969-01-27 Device for mounting flexible printing plates

Country Status (7)

Country Link
US (1) US3536009A (de)
JP (1) JPS4821121B1 (de)
CH (1) CH488565A (de)
DE (1) DE1611308A1 (de)
FR (1) FR2001944A1 (de)
GB (1) GB1205533A (de)
SE (1) SE347466B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005653A (en) * 1974-09-09 1977-02-01 Livermore And Knight Co., Inc. Vacuum cylinder for printing presses
US4183299A (en) * 1977-02-23 1980-01-15 Roland Offsetmaschinenfabrik Device for fitting a blanket on the cylinder of a printing press
US4480547A (en) * 1979-07-12 1984-11-06 Heidelberger Druckmaschinen Aktiengesellschaft Ink duct for offset or letterpress printing machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3345369A1 (de) * 1983-12-15 1985-06-27 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Einrichtung zur befestigung einer druckplatte am plattenzylinder einer druckmaschine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005653A (en) * 1974-09-09 1977-02-01 Livermore And Knight Co., Inc. Vacuum cylinder for printing presses
US4183299A (en) * 1977-02-23 1980-01-15 Roland Offsetmaschinenfabrik Device for fitting a blanket on the cylinder of a printing press
US4480547A (en) * 1979-07-12 1984-11-06 Heidelberger Druckmaschinen Aktiengesellschaft Ink duct for offset or letterpress printing machines

Also Published As

Publication number Publication date
FR2001944A1 (de) 1969-10-03
GB1205533A (en) 1970-09-16
SE347466B (de) 1972-08-07
DE1611308A1 (de) 1970-12-03
CH488565A (de) 1970-04-15
JPS4821121B1 (de) 1973-06-26

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