EP0939738A1 - Sheet feeding device - Google Patents
Sheet feeding deviceInfo
- Publication number
- EP0939738A1 EP0939738A1 EP97948692A EP97948692A EP0939738A1 EP 0939738 A1 EP0939738 A1 EP 0939738A1 EP 97948692 A EP97948692 A EP 97948692A EP 97948692 A EP97948692 A EP 97948692A EP 0939738 A1 EP0939738 A1 EP 0939738A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- gripper
- cylinder
- suction
- designed
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/08—Separating articles from piles using pneumatic force
- B65H3/0808—Suction grippers
- B65H3/0816—Suction grippers separating from the top of pile
- B65H3/0833—Suction grippers separating from the top of pile and acting on the front part of the articles relatively to the final separating direction
-
- 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
- B41F21/05—In-feed grippers
Definitions
- the invention relates to a device for feeding sheets from a sheet stack to a transport drum of a printing press.
- Printing presses are known (DR 435 592) which have a triple-size impression cylinder with three pressure calipers and three rows of grippers, the impression cylinder interacting with a double-size offset cylinder and this with a double-size plate cylinder.
- the plate cylinder are each assigned two inking units and dampening units that can be brought into active connection with the two printing plates of the plate cylinder.
- the sheets to be printed are fed to the three gripper rows of the printing cylinder. After the multi-color printing of the three sheets with two cylinder revolutions, the next three sheets are fed.
- a disadvantage is the process sequence described, which does not allow an increase in performance.
- the object of the invention is to provide a device for feeding sheets with high feed performance and low dynamic loads.
- Fig. 1 feed device Fig. 2 s / v / b diagram.
- REPLACEMENT B ⁇ (RULE 26) 1 schematically shows a feed device, the feed device separating the uppermost sheet 1 from a sheet stack 2 and conveying it to a sheet transport drum 3.
- the sheet transport drum 3 is designed as a pressure cylinder with three gripper rows 9, three cylinder channels 12 and with three pressure saddles 10.
- the sheet transport drum 3 is triple in size in relation to a normal cylinder, not shown, having only one pressure saddle 10.
- the sheet transport drum 3 is operatively connected to at least one offset cylinder 11 covered with a printing blanket, the offset cylinder 11 having two blanket saddles 13 and being double the size of the normal cylinder mentioned.
- the offset cylinder 11 is operatively connected to a printing forme cylinder 14, which is also double in size, with two printing forme saddles 15, on each of which a printing forme is clamped.
- the feed device consists of a transport element 4 and a pre-gripper 5.
- the transport element 4 is arranged above the sheet stack 2, preferably in the front area of the uppermost sheet 1, connected to an oscillation drive (not shown) and designed as a suction oscillator.
- the suction cups 6 of the suction oscillator are designed as lifting suction devices, preferably as so-called three-stage suction devices.
- the oscillation angle of the transport element 4 is a maximum of 25 ° and is preferably 10 °.
- the uppermost sheet 1 is gripped by the suction devices 6 of the transport element 4, which are designed as three-stage suction devices, in the region of the front edge (gripper edge) and separated from the sheet stack 2 by a vertical movement of the suction device. Then the sheet 1 is over the feed table 7 located in front of the sheet stack 2 to the one located at the front end of the feed table
- REPLACEMENT BLA ⁇ (RULE 26) Feed marks 8 promoted and released by the suction cups 6.
- the suction cups 6 are again moved vertically before the swinging-back process and lowered over the sheet stack 2 after the return swinging movement to the sheet stack 2; the process described then begins again.
- a pre-gripper 5 is arranged below the feed table 7.
- This pre-gripper is designed as a suction oscillator.
- the suction oscillator takes over the sheet 1 from the feed table 7, accelerates it and transfers it to one of the gripper rows 9 of the sheet transport drum 3.
- the sheet is fed to the sheet transport drum 5 only at every second gripper row 9.
- the design of the feed device as two suction oscillators leads to a very low-mass design and thus to no dynamic loads due to the use of the medium air as a holding element and the valve control elements used, so that high speeds are possible.
- the system register is optimally influenced by an asymmetrical shift of the turning point (WP) of the oscillating movement of the gripper in favor of a minimal acceleration of the arc (FIG. 2).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19644944A DE19644944A1 (en) | 1996-10-29 | 1996-10-29 | Device for feeding sheets |
DE19644944 | 1996-10-29 | ||
PCT/DE1997/002525 WO1998018704A1 (en) | 1996-10-29 | 1997-10-28 | Sheet feeding device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0939738A1 true EP0939738A1 (en) | 1999-09-08 |
EP0939738B1 EP0939738B1 (en) | 2001-04-11 |
Family
ID=7810318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97948692A Expired - Lifetime EP0939738B1 (en) | 1996-10-29 | 1997-10-28 | Sheet feeding device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0939738B1 (en) |
DE (2) | DE19644944A1 (en) |
WO (1) | WO1998018704A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10013379A1 (en) * | 2000-03-17 | 2001-09-20 | Koenig & Bauer Ag | Sheet-fed rotary printing machine |
DE102008014812A1 (en) | 2008-03-18 | 2009-09-24 | Koenig & Bauer Aktiengesellschaft | Device for feeding sheets |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2156577B2 (en) * | 1971-11-15 | 1974-07-04 | Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach | Pre-gripper swing system |
DD142694A1 (en) * | 1979-04-02 | 1980-07-09 | Guenter Weisbach | ARC PRINTING MACHINE WITH A BOTTOM PRE-GRIPPER |
DD142869A1 (en) * | 1979-04-02 | 1980-07-16 | Guenter Weisbach | SWINGING, BOTTOM PRE-GRIPPERS WORKING |
DE4332683A1 (en) * | 1993-09-25 | 1995-03-30 | Heidelberger Druckmasch Ag | Device for the drive of a swinging pre-gripper for individual-sheet transportation in a printing machine |
-
1996
- 1996-10-29 DE DE19644944A patent/DE19644944A1/en not_active Withdrawn
-
1997
- 1997-10-28 EP EP97948692A patent/EP0939738B1/en not_active Expired - Lifetime
- 1997-10-28 WO PCT/DE1997/002525 patent/WO1998018704A1/en active IP Right Grant
- 1997-10-28 DE DE59703364T patent/DE59703364D1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9818704A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59703364D1 (en) | 2001-05-17 |
DE19644944A1 (en) | 1998-04-30 |
EP0939738B1 (en) | 2001-04-11 |
WO1998018704A1 (en) | 1998-05-07 |
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