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
  • B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means

Definitions

• the invention relates to a device for tensioning and / or clamping flexible plates on a cylinder of a rotary printing press according to the preamble of claim 1.
• DE 43 35 140 C1 discloses a device for fastening a flexible printing plate on the form cylinder of a rotary printing press with at least one cylinder pit running in the axial direction.
• a first or leading hanging leg bent at an acute angle is hung on an edge of the first pit wall of the cylinder pit of the forme cylinder.
• a second or trailing suspension leg can be created approximately in the radial direction of the forme cylinder second pit wall of the cylinder pit.
• the cylinder pit receives a spindle that can be swiveled around its axis. Two leaf springs, each distributed across the width of the pressure plate, are fastened to the spindle and can be brought into or out of engagement with the hanging legs when the spindle is pivoted.
• the invention has for its object to provide a device for tensioning and / or clamping a flexible plate provided with folded-in suspension legs on a cylinder of a rotary printing press having slot fastenings.
• the advantages that can be achieved with the invention consist in particular in the fact that a robust, simply constructed and inexpensive device can be created.
• the device according to the invention is without spindle rotation adjustable in just two positions.
• Another advantage of the device is that it can consist of several short profile strips in their axial extension. This makes it possible to z. B. for maintenance purposes from the side of the cylinder pit without having to disassemble the cylinder from the side frame. Automatic plate feeding and removal using known devices is possible.
• Figure 1 shows a device in cross section in the plate holding or rest position.
• FIG. 2 shows a device according to FIG. 1 in the plate receiving or working position;
• Fig. 3 shows a section IM - III of FIG. 1 in a partial representation on a reduced scale and in a further embodiment.
• a cylinder 01 e.g. B. a plate or blanket cylinder of a rotary printing press is provided for receiving flexible plates 02 with at least one axial pit 03 extending in the axial direction.
• the cylinder pit 03 carries a front or "leading" hanging leg 06 of the plate 02 on a front edge 04 pointing in the production direction A of the cylinder 01.
• the plate 02 also has a rear or "trailing" hanging leg 07, which on a second rear edge 08 the same cylinder pit 03 is attached.
• the mounting slot 09 is formed in its internal width b so that at least two hanging legs 06; 07 find space in it, which protrude towards the cylinder pit 03.
• the cylinder pit 03 can be approximately circular in cross section and is connected to the lateral surface 11 by the fastening slot 09.
• a three-armed profile bar 14 Arranged in the cylinder pit 03 is a three-armed profile bar 14 which can be pivoted about its longitudinal axis and extends with its longitudinal axis in the axial direction of the cylinder pit 03.
• the arms 16; 17; 18 also extend in the form of strips in the direction parallel to the axis.
• a first arm 16 or power arm viewed in cross section (FIG. 1), points approximately in the radial direction facing away from the plate 02.
• a second arm 17 or load arm points approximately in the radial direction, however, facing plate 02.
• the free end 19 of the second arm 17 is arranged such that it can be pressed against the second hanging leg 07 resting against the second pit wall 13.
• the third arm 18 or bearing arm is arranged, which is slightly angled at its free end 21 and carries a bead 22.
• This bead 22 is pivotally mounted in a groove 23 of a support strip 24 which is fixed in the axially parallel direction, that is to say a bead 22 and groove 23 form a bearing.
• a wedge-shaped slot 28 is formed between a first support surface 26 of the third arm 18 pointing in the direction of the fastening slot 09 and a second support surface 27 fixed to the support strip and arranged at an angle gamma 1 of approximately 30 ° to 60 °, in particular approximately 45 °.
• the wedge angle gamma 1 can be changed into wedge angle gamma 2 (approx. 50 °) by pivoting the profile strip 14.
• the first support surface 26 located on the third arm 18 can e.g. B. be formed in that the second arm 17 receives a recess 29.
• the wedge-shaped, wedge angle variable slot 28 receives a pinch roller 31.
• the pinch roller 31 lies in the plate holding position (FIG. 1) on the front hanging leg 06 and presses it against the first pit wall 12 or moves away from the pit wall 12 in a second plate removal position (FIG. 2).
• an adjusting means for. B. arranged with a fillable with compressed air hose, called air hose 33.
• the air hose 33 is z. B. is provided with a valve and is pressurized via an associated line, not shown, to the cylinder journal and by means of a known rotary introduction if necessary with compressed air.
• profile bar 14 and support bar 24 are one or more springs 34; z. B. compression springs, the ends of which are on the one hand on the support bar 24 and on the other hand, support in blind holes 35 on the side of the first arm 16 of the pivotable profile strip 14 remote from the air hose.
• the air hose 33 is pressurized with compressed air.
• an abutment surface 36 of the air hose 33 bears against the wall 32 of the cylinder pit 03 and a force application surface 37 of the air hose 33 bears against the first arm 16 of the profile strip 14.
• the wedge angle increases from gamma 1 to gamma 2, so that the pinch roller 31 rolls in the direction of the apex of the wedge angle gamma 2 (FIG. 2).
• the profile strip 14 is in the axis-parallel direction in several shorter profile strips 38; 39; 40 divided.
• the same also applies to the support strip 24 which is divided into a plurality of support strips 42; 43; 44 is divided.
• Each support bar 42; 43; 44 is releasable relative to the adjacent support bar, for. B. connected by means of a clutch.
• This clutch can e.g. B. act positively and by means of a double-sided toothing 46; 47 of the support strips 42; 43; 44 can be realized.
• the air hose 33 is always made in one piece and runs through the entire cylinder pit 03.
• a free end of the first and last support strip located in the cylinder pit 03 is connected in a rotationally fixed manner to an end coupling piece 48.
• the end coupling piece 48 is fastened with its parts covering the cylinder pit 03 to the flanks of the cylinder 01, for. B. screwed.
• the device can, for. B. can be removed from the cylinder pit 03 for maintenance purposes without the cylinder 01 having to be removed from the side frame.
• Beta opening angle (13; 11)

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
• Supports For Pipes And Cables (AREA)
• Forklifts And Lifting Vehicles (AREA)
• Load-Engaging Elements For Cranes (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7909684

Family Applications (1)

Country Status (5)

Families Citing this family (7)

Family Cites Families (5)

• 1999
  • 1999-05-29 DE DE19924785A patent/DE19924785C2/de not_active Expired - Fee Related
• 2000
  • 2000-05-25 AT AT00949055T patent/ATE271464T1/de not_active IP Right Cessation
  • 2000-05-25 DE DE50007161T patent/DE50007161D1/de not_active Expired - Fee Related
  • 2000-05-25 EP EP00949055A patent/EP1268210B1/fr not_active Expired - Lifetime
  • 2000-05-25 US US09/926,628 patent/US6543358B1/en not_active Expired - Fee Related
  • 2000-05-25 WO PCT/DE2000/001700 patent/WO2000073066A2/fr active IP Right Grant

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events