US3650211A - A sheet gripping device for a rotary printing press - Google Patents

A sheet gripping device for a rotary printing press Download PDF

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Publication number
US3650211A
US3650211A US11688A US3650211DA US3650211A US 3650211 A US3650211 A US 3650211A US 11688 A US11688 A US 11688A US 3650211D A US3650211D A US 3650211DA US 3650211 A US3650211 A US 3650211A
Authority
US
United States
Prior art keywords
gripper
shaft
pivot pin
abutment surface
gripper member
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
US11688A
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English (en)
Inventor
Wilhelm Nentwich
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.)
Roland Offsetmaschinenfabrik Faber and Schleicher AG
Original Assignee
Roland Offsetmaschinenfabrik Faber and Schleicher 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 Roland Offsetmaschinenfabrik Faber and Schleicher AG filed Critical Roland Offsetmaschinenfabrik Faber and Schleicher AG
Application granted granted Critical
Publication of US3650211A publication Critical patent/US3650211A/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
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/104—Gripper details

Definitions

  • a sheet gripping device for a rotary printing press includes a pivotal gripper finger which is moved into and out of gripping engagement with an abutment surface by reciprocating movements of a gripper shaft onvwhich the gripper finger is sup ported.
  • the surface area engageable by the gripper finger in its gripping position and the rotational axes of the shaft and the gripper finger are located on a substantially rectilinear line when the gripper finger is in engagement with the abutment surface.
  • SHEET 2 [1F 2 Inventor.- A/(LHELM A E/VT /MH A SHEET GRIPPING DEVICE FOR A ROTARY PRINTING PRESS
  • the invention relates to a sheet gripping device for a sheet using rotary printing press, and more particularly, to a sheet gripping device in which a spring loaded gripper finger coacts with a gripper abutment surface and clamping members clamped upon a reciprocating gripper shaft support the gripper finger pivotal about an axis parallel to the axis of the gripper shaft for movement of the gripper finger into and out of sheet gripping engagement with the abutment surface.
  • the gripping force of the individual gripper fingers corresponds in such arrangement to the loading and the dimensioning of the springs associated with the individual gripper fingers and to the individually adjustable spring elongation which, in turn, corresponds to the distance by which the gripper fingers, more specifically, the tips of the gripper fingers become separated from the stops on the clamping means, taking into account the ratio of the involved leverage.
  • a pushing movement occurs for instance with the sheet gripping device according to British Pat. No. 310,177.
  • the device according to this patent comprises a clamping member clamped upon the gripper shaft.
  • a gripper finger is hinged to this clamping member and is spring-biased relative thereto.
  • the gripper finger unavoidably begins to push in the direction of the plane of the gripped sheet when the rotation of the gripper shaft is continued to produce the required gripping force after the tip of the gripping finger hasfirst engaged the sheet since such continued turning of the gripper shaft causes displacement of the point at which the gripper finger is hinged to the clamping member.
  • a more specific object of the invention is to provide a novel and improved sheet gripping device of the general kind above referred to in which pushing of the gripper fingers relative to the support or abutment surface therefor during the final tuming movement of the gripper shaft is effectively avoided. Accordingly, the gripping device according to the invention is free of the aforepointed out disadvantages.
  • the pivotal axis of the gripper fingers moves along a circular path about the rotational axis of the gripper shaft when the same is turned to effect the gripping action.
  • This circular path for a certain distance closely coincides with an ideal circular path which has as center the area upon which the gripper fingers rest when engaged with the support surface. Accordingly, the gripper finger will be only slightly displaced when the gripper shaft is turning to produce the required gripping pressure. In other words, substantial pushing of a sheet by the tip of the gripper finger is effectively avoided.
  • the arrangement of the invention has the further advantage that the force at the hinge for the gripper finger which holds the same in its closed and also in its open position in equilibrium can be low.
  • sealing elements are provided for sealing the hinge means for the gripper fingers.
  • Such sealing means effectively reduce the danger of a seizure at bearings of the hinge means by the ingress of dust particles, and hence the bearing tolerances can be made considerably closer than heretofore possible.
  • a sealed bearing can be readily lubricated.
  • FIG. 1 is an elevational diagrammatic view, partly in section, of a sheet gripping device according to the invention showing the device in an intermediate operational stage;
  • FIG. 2 is an elevational view of FIG. I seen in the direction of arrow A;
  • FIG. 3 is a section taken on line Ill-Ill of FIG. 1;
  • FIG. 4 is an elevational view similar to FIG. 1, showing the device in its fully open position
  • FIG. 5 is an elevational view similar to FIGS. 1 and 4, showing the device in its fully closed or gripping position.
  • the exemplified sheet gripping device comprises a clamping means formed by two curved clamping members 1 and 2 which encompass a gripper shaft 5.
  • the clamping members are joined at one end by a hinge means including a pivot pin 3 which pivotally seats a gripper member in the form of a gripper finger 6 of generally U-shaped cross section.
  • the other ends of clamping members 1 and 2 are pressed toward each other by tightening a screw bolt 4 thereby clamping the two members to the shaft and thus securing pivot pin 3 in a fixed spatial position relative to the shaft so that the pin will participate in angular movements of the shaft.
  • the shaft should be visualized as being reciprocated through a predetermined angle by suitable drive means (not shown). Such reciprocating movements of the gripper shaft are common practice with sheet gripping devices of the kind here involved and hence a showing of drive means suitable for the purpose is not essential for the understanding of the invention.
  • FIG. 2 also shows in detail bearing means included in the hinge means for the gripper finger.
  • a bearing 14 which may be a dry or permanently lubricated bearing, or it may be a bearing requiring lubrication.
  • a bearing bore l5 for pivot pin 3 is closed off by suitable and conventional sealing elements 16 and 17.
  • the free end of clamping member 2 which is located between the branches of gripper finger 6 is formed with an extension 10.
  • the gripper finger is biased in counterclockwise direction, that is, toward extension 10 by a spring assembly comprising a coil spring 11 fitted upon a bar 13 slidably extended through extension 10.
  • the bar is held in the gripper finger by a head 13a and has threaded upon its other end a nut 12.
  • the coil spring is interposed between extension 10 and nut 12.
  • the setting of nut 12 controls the spring force with which gripper finger 6 is biased in counterclockwise direction.
  • the extension is formed with a slanted abutment surface 10a engageable with a set screw 9 threaded into the gripper finger.
  • the setting of screw 9 limits the extent of the possible movement of the gripper finger in counterclockwise direction by the action of spring 11 for a purpose which will be explained hereinafter.
  • the gripper finger 6 terminates at its free end in a tip 7 coacting with a support or abutment surface on a stationarily mounted support member 8.
  • shaft 5 is turned in clockwise direction through the required distance.
  • the support surface 20, and more specifically, the limited small area thereof which is engageable with tip 7, the rotational axis of shaft 5 and the rotational axis of pin 3, are located on a common rectilinear line 23 when the device is in the position of FIG. 1. As previously described, it is due to such spatial disposition of the support surface and the two axes that no extensive and thus undesirable pushing movement of tip 7 relative to surface 20 can occur when the device is advanced from the position of FIG. 1 into the position of FIG. 5.
  • FIG. 4 shows the angle a through which shaft 5 is clockwise turned for movement of the device from the position of FIG. 1 into the position of FIG. 4.
  • FIG. 5 indicates the angle a through which the shaft is counterclockwise turned for advancement of the device from the position of FIG. 1 into the position of FIG. 5.
  • FIG. 5 shows a circular path 25 representing the path along which the axis of pivot pin 3 would move if it were turned about the area surface 20 on which the gripper finger tip 7 resets as shown in FIGS. 1 and 5. A movement along this path would cause the gripper finger tip to remain at rest on support surface 20. In other words, movement of the axis of pin 3 along path 25 constitutes an ideal condition.
  • the axis of pivot pin 3 moves along a circular path 26 when the gripper shaft 5 and with it pin 3 are turned.
  • the resulting angle a as shown in FIG. 5 represents the turning of gripper shaft 5 and pivot pin 3 as are necessary to produce the pressure between the gripper finger tip 5 against surface 20 that is required to grip a sheet.
  • the turning angle a is limited by the set distance between screw 9 and abutment surface 10a is therefor as shown in FIG. 5.
  • a sheet gripping device for a rotary printing press comprising in combination:
  • a gripper shaft mounted for reciprocating angular movement
  • a gripper member engageable at one end with said surface to grip a sheet between said members
  • hinge means including a pivot pin pivotally supporting said gripper member at the other end thereof; and mounting means securing said hinge means to the gripper shaft for reciprocating movement of the hinge means in unison therewith;
  • said pivot pin and said support surface being positioned on opposite sides of the gripper shaft with the pivot pin parallel to the axis of the shaft, the gripper member being pivotal about said pivot pin between a gripper closed position in which the gripper member engages said abutment surface and a gripper open position in which the gripper member is separated from the abutment surface;
  • the area of the abutment surface engageable by-the gripper member and the axes of the gripper shaft and the pivot pin being located on a common substantially rectilinear line when the gripper member is in juxtaposition with the abutment surface.
  • hinge means includes sealing means sealing said pivot pin against access of moisture and impurities.
  • said mounting means comprises a pair of curved clamping member encompassing said shaft and hinged together at one end, the hinged ends of the clamping members mounting said hinge means, and releasable locking means engaging the other ends of the clamping members for pulling said ends toward each other thereby clamping the clamping members to the shaft and thus securing the hinge means and also the pivot pin in position.
  • said spring means including a loaded coil spring abutting against said gripper member and said extension.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
US11688A 1969-02-19 1970-02-16 A sheet gripping device for a rotary printing press Expired - Lifetime US3650211A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691908181 DE1908181A1 (de) 1969-02-19 1969-02-19 Klemmgreifer fuer Bogenrotationsdruckmaschinen

Publications (1)

Publication Number Publication Date
US3650211A true US3650211A (en) 1972-03-21

Family

ID=5725662

Family Applications (1)

Application Number Title Priority Date Filing Date
US11688A Expired - Lifetime US3650211A (en) 1969-02-19 1970-02-16 A sheet gripping device for a rotary printing press

Country Status (6)

Country Link
US (1) US3650211A (de)
CH (1) CH498722A (de)
DE (1) DE1908181A1 (de)
FR (1) FR2035365A5 (de)
GB (1) GB1247476A (de)
SE (1) SE372466B (de)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839959A (en) * 1971-11-15 1974-10-08 Roland Offsetmaschf Reciprocating gripper for feeding sheets in rotary printing machines
JPS53158305U (de) * 1977-05-17 1978-12-12
US4224873A (en) * 1977-06-03 1980-09-30 Koenig & Bauer Aktiengesellschaft Clamping gripper
US4253396A (en) * 1978-05-20 1981-03-03 Koenig & Bauer Aktiengesellschaft Sheet gripper
US4372209A (en) * 1980-11-17 1983-02-08 Veb Kombinat Polygraph "Werner Lamberz" Sheet gripping jar arrangement
US4501415A (en) * 1981-09-04 1985-02-26 Motter Printing Press Co. Balanced deflection gripper for sheet handling equipment
US4718343A (en) * 1985-08-19 1988-01-12 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Resilient sheet gripper for a sheet-fed rotary printing press
US4718342A (en) * 1985-08-19 1988-01-12 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Resilient sheet gripper for a sheet-fed rotary printing press
US4719854A (en) * 1985-08-19 1988-01-19 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Resilient sheet gripper for a sheet-fed rotary printing press
US4781370A (en) * 1986-07-11 1988-11-01 Miller-Johannisberg, Druckmaschinen Gmbh Sheet gripping apparatus
US4864929A (en) * 1985-08-19 1989-09-12 M.A.N.-Roland Druckmaschinen Resilient sheet gripper for a sheet-fed rotary printing press
US4873926A (en) * 1986-09-26 1989-10-17 Man Poland Druckmaschinen Ag Clamping gripper with resultant force through contact point
US4947748A (en) * 1988-06-24 1990-08-14 Heidelberger Druckmaschinen Ag Sheet gripper on sheet-fed rotary printing presses
US5303650A (en) * 1991-08-22 1994-04-19 Koenig & Bauer Aktiengesellschaft Sheet gripper assembly
US5390600A (en) * 1992-07-22 1995-02-21 Heidelberger Druckmaschinen Ag Sheet gripper device on a paper-guiding cylinder of a sheet-fed printing press
EP1306211A1 (de) * 2001-10-24 2003-05-02 Koenig & Bauer Aktiengesellschaft Greifer-/Greiferwellesystem
US20060117976A1 (en) * 2002-09-06 2006-06-08 Hoier Gunther J Clamping device for a printing plate
US20070199465A1 (en) * 2006-02-20 2007-08-30 Heidelberger Druckmaschinen Ag Sheet-transporting apparatus
US20090095181A1 (en) * 2007-10-15 2009-04-16 Heidelberger Druckmaschinen Ag Transfer Drum Between Printing Units of a Sheet-Fed Printing Press
CN102950880A (zh) * 2011-08-31 2013-03-06 威海印刷机械有限公司 一种印刷机叼纸牙装置
US20220153014A1 (en) * 2019-03-19 2022-05-19 Landa Labs (2012) Ltd. Arrangements for securing cylinder jackets
US12240991B2 (en) 2019-03-19 2025-03-04 Landa Corporation Ltd. Compositions and protective coatings made therefrom
US12384145B2 (en) 2018-11-18 2025-08-12 Landa Corporation Ltd. Printed output of digital printing systems

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2233431C3 (de) * 1972-07-07 1983-12-29 Koenig & Bauer AG, 8700 Würzburg Greifer für Druckmaschinen
DE8404981U1 (de) * 1984-02-18 1984-05-10 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Bogengreifer fuer druckmaschinen
DE3529598A1 (de) * 1985-08-19 1987-02-26 Roland Man Druckmasch Federnder greifer fuer bogenrotationsdruckmaschinen
DE3632769A1 (de) * 1986-09-26 1988-04-07 Roland Man Druckmasch Klemmgreifer fuer bogenrotationsdruckmaschinen
DE3914646A1 (de) * 1989-05-03 1990-11-08 Heidelberger Druckmasch Ag Greifereinrichtung an bogenrotationsdruckmaschinen
DE4026237C1 (de) * 1990-08-18 1992-02-06 Man Miller Druckmaschinen Gmbh, 6222 Geisenheim, De
DE102008058069B4 (de) 2007-12-14 2020-07-23 Heidelberger Druckmaschinen Ag Übertragungstrommel zwischen Druckwerken einer Bogendruckmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US600938A (en) * 1898-03-22 Journal-bearing
GB310177A (en) * 1928-04-14 1929-04-25 Fred Wesley Wright Improvements in and relating to sheet-gripping mechanisms for printing machines
DE493269C (de) * 1930-03-05 Mailaender Fa J G Greifer bei Druckzylindern fuer Druckmaschinen
DE1103352B (de) * 1959-05-08 1961-03-30 Roland Offsetmaschf Greifer fuer Druckmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US600938A (en) * 1898-03-22 Journal-bearing
DE493269C (de) * 1930-03-05 Mailaender Fa J G Greifer bei Druckzylindern fuer Druckmaschinen
GB310177A (en) * 1928-04-14 1929-04-25 Fred Wesley Wright Improvements in and relating to sheet-gripping mechanisms for printing machines
DE1103352B (de) * 1959-05-08 1961-03-30 Roland Offsetmaschf Greifer fuer Druckmaschinen

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839959A (en) * 1971-11-15 1974-10-08 Roland Offsetmaschf Reciprocating gripper for feeding sheets in rotary printing machines
JPS53158305U (de) * 1977-05-17 1978-12-12
US4224873A (en) * 1977-06-03 1980-09-30 Koenig & Bauer Aktiengesellschaft Clamping gripper
US4253396A (en) * 1978-05-20 1981-03-03 Koenig & Bauer Aktiengesellschaft Sheet gripper
US4372209A (en) * 1980-11-17 1983-02-08 Veb Kombinat Polygraph "Werner Lamberz" Sheet gripping jar arrangement
US4501415A (en) * 1981-09-04 1985-02-26 Motter Printing Press Co. Balanced deflection gripper for sheet handling equipment
US4718343A (en) * 1985-08-19 1988-01-12 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Resilient sheet gripper for a sheet-fed rotary printing press
US4718342A (en) * 1985-08-19 1988-01-12 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Resilient sheet gripper for a sheet-fed rotary printing press
US4719854A (en) * 1985-08-19 1988-01-19 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Resilient sheet gripper for a sheet-fed rotary printing press
US4864929A (en) * 1985-08-19 1989-09-12 M.A.N.-Roland Druckmaschinen Resilient sheet gripper for a sheet-fed rotary printing press
US4781370A (en) * 1986-07-11 1988-11-01 Miller-Johannisberg, Druckmaschinen Gmbh Sheet gripping apparatus
US4873926A (en) * 1986-09-26 1989-10-17 Man Poland Druckmaschinen Ag Clamping gripper with resultant force through contact point
US4947748A (en) * 1988-06-24 1990-08-14 Heidelberger Druckmaschinen Ag Sheet gripper on sheet-fed rotary printing presses
AU616024B2 (en) * 1988-06-24 1991-10-17 Heidelberger Druckmaschinen Aktiengesellschaft Sheet gripper on sheet-fed rotary printing press
US5303650A (en) * 1991-08-22 1994-04-19 Koenig & Bauer Aktiengesellschaft Sheet gripper assembly
US5390600A (en) * 1992-07-22 1995-02-21 Heidelberger Druckmaschinen Ag Sheet gripper device on a paper-guiding cylinder of a sheet-fed printing press
EP1306211A1 (de) * 2001-10-24 2003-05-02 Koenig & Bauer Aktiengesellschaft Greifer-/Greiferwellesystem
US7640855B2 (en) * 2002-09-06 2010-01-05 Kba-Giori S.A. Clamping device for a printing plate
US20060117976A1 (en) * 2002-09-06 2006-06-08 Hoier Gunther J Clamping device for a printing plate
US7673563B2 (en) 2006-02-20 2010-03-09 Heidelberger Druckmaschinen Ag Sheet-transporting apparatus
US20070199465A1 (en) * 2006-02-20 2007-08-30 Heidelberger Druckmaschinen Ag Sheet-transporting apparatus
CN101024328B (zh) * 2006-02-20 2010-12-15 海德堡印刷机械股份公司 用于传送纸张的装置
US20090095181A1 (en) * 2007-10-15 2009-04-16 Heidelberger Druckmaschinen Ag Transfer Drum Between Printing Units of a Sheet-Fed Printing Press
CN102950880A (zh) * 2011-08-31 2013-03-06 威海印刷机械有限公司 一种印刷机叼纸牙装置
CN102950880B (zh) * 2011-08-31 2015-04-22 威海印刷机械有限公司 一种印刷机叼纸牙装置
US12384145B2 (en) 2018-11-18 2025-08-12 Landa Corporation Ltd. Printed output of digital printing systems
US20220153014A1 (en) * 2019-03-19 2022-05-19 Landa Labs (2012) Ltd. Arrangements for securing cylinder jackets
US12240991B2 (en) 2019-03-19 2025-03-04 Landa Corporation Ltd. Compositions and protective coatings made therefrom
US12246528B2 (en) * 2019-03-19 2025-03-11 Landa Corporation Ltd. Arrangements for securing cylinder jackets

Also Published As

Publication number Publication date
CH498722A (de) 1970-11-15
GB1247476A (en) 1971-09-22
FR2035365A5 (de) 1970-12-18
DE1908181A1 (de) 1970-11-05
SE372466B (de) 1974-12-23

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