US3791642A - Sheet feeder for printing presses - Google Patents

Sheet feeder for printing presses Download PDF

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Publication number
US3791642A
US3791642A US00210897A US3791642DA US3791642A US 3791642 A US3791642 A US 3791642A US 00210897 A US00210897 A US 00210897A US 3791642D A US3791642D A US 3791642DA US 3791642 A US3791642 A US 3791642A
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US
United States
Prior art keywords
sheet
pregripper
rotating
driving
acceleration
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
US00210897A
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English (en)
Inventor
H Schunemann
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
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Publication of US3791642A publication Critical patent/US3791642A/en
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Expired - Lifetime legal-status Critical Current

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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
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/06—Movable stops or gauges, e.g. rising and falling front stops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/12—Revolving grippers, e.g. mounted on arms, frames or cylinders

Definitions

  • the invention relates to a sheet feeding mechanism for printing presses with rotating pregripper.
  • the mechanism provides considerably higher machine speeds.
  • a rotating pregripper is driven by a Maltese cross transmission such that there is a relatively short resting time on a relatively long acceleration angle.
  • the rotating pregripper is equipped with grippers which withdraw under its surface.
  • the pregripper is located under a sheet feeding table having front lays which come from below a throw on aligning or prealigning device in covered state. Side'lays in covered state are provided on the table along with a sheet displacing mechanism for releasing the side lays.
  • the acceleration and braking times are increased by the square, i.e., quadruple to appro imately 200 in order to achieve the desired motion features yet not result in higher forces of acceleration.
  • the rotating pregripper has means for laterally shifting the same after throwon and until sheet transfer.
  • This last mentioned shifting means has means responsive to the side lays being used so that when lateral alignment of the sheet is not attained before leaving the front lays it is reached before sheet transfer from the rotating pregripper.
  • Sheet feeder devices for printing presses are already known. They consist of a feeding table with stream feeder, front lays operating from above or from below, side lays as well as pregripper, either going back and forth or rotating, which takes the aligned sheets from standstill, accelerates them and passes them on at circumferential speed to the impression cylinder or to a transfer drum.
  • German patent No. 653,308 deals with sheet side shifting in order to free the side lay when sheets come in a close sheet stream.
  • the object of the invention is the task of creating sheet feeder which allows considerably higher machine speeds than have been achieved today.
  • a rotating pregripper with short resting time on long throw-on angle placed under thefeeding table and equipped with grippers which can withdraw under the surface of the pregripper, as well as front lays from below, a sheet aligning device or prealigning device in covered state, and side lays as well as a sheet displacing device setting free the side lays in covered state.
  • this new combination of already known single features has a surprising effect and allows an increase of the capacity to nearly the double of todays most modern printing presses.
  • the throw-on and braking times should increase by the square i.e., quadruple to approximately 200 in order to get the same motion features and not result in higher forces of acceleration.
  • the pregrippers swinging back and forth are to be completely excluded, as they only may reach, even if the times are symetrically divided up I and without any standstill, a throw-on angle and a 90 braking angle per each swing back and forth.
  • Rotating pregrippers spare the swinging back and can be brought to a maximum of slow-down time, calculating a 36 stand-still time there can be disposed of 162 to accelerate until sheet transfer and 162 to slow down.
  • German Auslegeschrift 1,102,766 it is already known to place a stop drum under the feeding table and to use front lays from below. Contrary to the combination according to this invention a long resting time for sheet aligning is explicitely required and also an arrangement of at least three grippers on the feeding drum is required drum so that there is 240 resting time and only during each 60 does the throw-on and braking angle arise.
  • German patent 1,102,766 does not contain any hint to a possibly doubled capacity as it was ignored or not appreciated that short resting times are necessary and no long ones, as well as special grippers withdrawing under the surface of the drum and a special equipment at the side lay. Nor does the described gear give any hint of how to reach considerably larger throw-on angles as the usual Maltese crosses only allow throw-on angles up to approximately 60.
  • reversal or suction grippers are to be used which do not touch an already aligned sheet in released state at the feeding table 1.
  • the grippers 7 pass the sheet to a transfer drum 8 which passes the sheet on to an impression cylinder 9.
  • a driving plate 10 is driven through toothed wheels 10a thereon.
  • Driving plate 10 has three driving rolls ll spaced thereon at 120 and the driving plate 10 is driven at a transmission rate of 1 3.
  • the driving rolls dive one after the other into five switch slotted holes 12.1 ofa Maltese cross 12.
  • the Maltese cross 12 makes a switch step of 360 divided by 5 equals to 72, per single-tour or single turn revolution of the transfer drum 8.
  • the switch step is geared by toothed wheels 13, 14 at a ratio of 2.5 l to the pregripper 6. With each switch step of the Maltese cross 12 the pregripper 6 is turned through 180.
  • FIG. 3 shows the known cooperation of Maltese cross 12 and driving plate 10. As there are 3 driving rolls 11 the distance therebetween amounts to 120.
  • the fivepart Maltese cross 12 makes switch steps of 72 possible. Therefore half a switch step is 36 so that, when diving right-angularly, half the driving angle can only amount to 54. There is still a remaining angle of 6 which each driving roll has to pass on both sides, a total angle of 12, before the acceleration of the Maltese cross starts.
  • the diameter of the Maltese cross 12 is effectively larger by these 1 6 curve pieces as indicated at 12.2, and the slotted holes extend outwardly in a circular arc shape correspondingly to the radius which the driving rolls 11 form.
  • FIG. 4 shows a time diagram of the herein invented combination for a diameter of impression cylinder amounting to 300 mm which corresponds to 942 mm circumference and a maximum sheet size of 820 mm. Corresponding with this the cylinder groove only amounts to 46 or 122 mm.
  • a sheet aligning time of 60 at the front lay and 90 at the side lay is taken as a basis.
  • the feeding drum starts its motion at 0 of impression cylinder turn. After 75 the front lay closes the feeding drum starts so slowly that it then moves only 40 mm. After 90 the second sheet touches the front lay and has 60 (VM) slowing time until 150. Then the side lay starts and draws until 240, i.e., 90 (ZM) long. At a machine speed of 8,000 sheets/hr.
  • the new feeding system accomplishes the given task. It allows a maximum throw-on angle of the feeder. As shown, in the time diagram, however, every process is executed covered by the previous sheet, these large throw-on angles are only possible when the front lays and the sheet feeder operate on the sheets in covered state, i.e., both have to be placed under the feeding table.
  • a sheet feeder according to claim 1 including means for laterally shifting of said'rotating pregripper after acceleration and until sheet transfer, said last named means having means responsive to said side lay means being used whereby when lateral alignment of the sheet is not reached before leaving the front lay means it is reached before sheet transfer from said rotating pregripper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
US00210897A 1970-12-24 1971-12-22 Sheet feeder for printing presses Expired - Lifetime US3791642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702063818 DE2063818B2 (de) 1970-12-24 1970-12-24 Bogenzufuehrung bei druckmaschinen

Publications (1)

Publication Number Publication Date
US3791642A true US3791642A (en) 1974-02-12

Family

ID=5792201

Family Applications (1)

Application Number Title Priority Date Filing Date
US00210897A Expired - Lifetime US3791642A (en) 1970-12-24 1971-12-22 Sheet feeder for printing presses

Country Status (8)

Country Link
US (1) US3791642A (enrdf_load_stackoverflow)
JP (1) JPS5134764B1 (enrdf_load_stackoverflow)
CH (1) CH531415A (enrdf_load_stackoverflow)
DE (1) DE2063818B2 (enrdf_load_stackoverflow)
FR (1) FR2119698A5 (enrdf_load_stackoverflow)
GB (1) GB1368617A (enrdf_load_stackoverflow)
IT (1) IT945977B (enrdf_load_stackoverflow)
SE (1) SE396741B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4696465A (en) * 1984-11-17 1987-09-29 Heidelberger Druckmaschinen Ag Method and device for aligning sheets
US20050179196A1 (en) * 2002-04-13 2005-08-18 Hans-Bernhard Bolza-Schunemann Devices for aligning sheets and a method for aligning sheets transversal to the direction of travel of the sheets
US20100201060A1 (en) * 2007-07-28 2010-08-12 Winkler + Dunnebier Ag Apparatus and method for drawing in flat material pieces and in-register transportation of the flat material pieces

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2604379C2 (de) * 1976-02-05 1982-02-25 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Verfahren zum Ausrichten von Bogen
DE2744925C2 (de) * 1977-10-06 1986-06-12 Koenig & Bauer AG, 8700 Würzburg Einrichtung auf einer Stopptrommel für eine Bogenrotationsdruckmaschine
DD142694A1 (de) * 1979-04-02 1980-07-09 Guenter Weisbach Bogenrotationsdruckmaschine mit einem von unten arbeitenden vorgreifer
DE3305219A1 (de) * 1983-02-16 1984-08-16 Koenig & Bauer AG, 8700 Würzburg Bogenzufuehrung fuer druckmaschinen
DE3625308A1 (de) * 1986-07-25 1988-02-04 Koenig & Bauer Ag Getriebe fuer eine bogenrotationsdruckmaschine
CN108059012B (zh) * 2017-12-21 2019-06-07 重庆渝州印务厂 印刷折页设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE653308C (de) * 1935-04-06 1937-11-23 E H Georg Spiess Dr Ing Verfahren zum seitlichen Ausrichten
US2857161A (en) * 1956-08-16 1958-10-21 Harris Intertype Corp Sheet feeder
US2887317A (en) * 1954-11-11 1959-05-19 Koenig & Bauer Schnellpressfab Drive of sheet-feeding device with sheetfeeders with printing machines
DE1212562B (de) * 1965-01-20 1966-03-17 Koenig & Bauer Schnellpressfab Rotierender Bogenzufuehrer an Druckmaschinen
US3540723A (en) * 1968-03-30 1970-11-17 Koenig & Bauer Schnellpressfab Gear folder for rotary presses

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE653308C (de) * 1935-04-06 1937-11-23 E H Georg Spiess Dr Ing Verfahren zum seitlichen Ausrichten
US2887317A (en) * 1954-11-11 1959-05-19 Koenig & Bauer Schnellpressfab Drive of sheet-feeding device with sheetfeeders with printing machines
US2857161A (en) * 1956-08-16 1958-10-21 Harris Intertype Corp Sheet feeder
DE1212562B (de) * 1965-01-20 1966-03-17 Koenig & Bauer Schnellpressfab Rotierender Bogenzufuehrer an Druckmaschinen
US3540723A (en) * 1968-03-30 1970-11-17 Koenig & Bauer Schnellpressfab Gear folder for rotary presses

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4696465A (en) * 1984-11-17 1987-09-29 Heidelberger Druckmaschinen Ag Method and device for aligning sheets
US20050179196A1 (en) * 2002-04-13 2005-08-18 Hans-Bernhard Bolza-Schunemann Devices for aligning sheets and a method for aligning sheets transversal to the direction of travel of the sheets
US7357390B2 (en) 2002-04-13 2008-04-15 Koenig & Bauer Aktiengesellschaft Devices for aligning sheets and a method for aligning sheets transversal to the direction of travel of the sheets
US20100201060A1 (en) * 2007-07-28 2010-08-12 Winkler + Dunnebier Ag Apparatus and method for drawing in flat material pieces and in-register transportation of the flat material pieces
US8123221B2 (en) 2007-07-28 2012-02-28 WINKLER + DüNNEBIER AG Apparatus and method for drawing in flat material pieces and in-register transportation of the flat material pieces

Also Published As

Publication number Publication date
GB1368617A (en) 1974-10-02
FR2119698A5 (enrdf_load_stackoverflow) 1972-08-04
DE2063818A1 (de) 1972-07-06
SE396741B (sv) 1977-10-03
DE2063818C3 (enrdf_load_stackoverflow) 1974-01-24
DE2063818B2 (de) 1972-11-30
CH531415A (de) 1972-12-15
JPS5134764B1 (enrdf_load_stackoverflow) 1976-09-28
IT945977B (it) 1973-05-10

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