US3861667A - Apparatus for picking up and feeding individual sheets from a stack of sheets - Google Patents

Apparatus for picking up and feeding individual sheets from a stack of sheets Download PDF

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Publication number
US3861667A
US3861667A US344556A US34455673A US3861667A US 3861667 A US3861667 A US 3861667A US 344556 A US344556 A US 344556A US 34455673 A US34455673 A US 34455673A US 3861667 A US3861667 A US 3861667A
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US
United States
Prior art keywords
roller
pick
delivery roller
sheet
sheets
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
US344556A
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English (en)
Inventor
Hans Joachim Jahme
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.)
Neue Rotaprint GmbH
Original Assignee
Individual
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
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Publication of US3861667A publication Critical patent/US3861667A/en
Assigned to NORFIN GRAPHISCHE PRODUKTE GMBH reassignment NORFIN GRAPHISCHE PRODUKTE GMBH ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: JAHME, HANS J.
Assigned to NEUE ROTAPRINT GMBH, NEUE ROTAPRINT GMBH reassignment NEUE ROTAPRINT GMBH, NEUE ROTAPRINT GMBH ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: NORFIN GRAPHISCHE PRODUKTE GMBH
Anticipated expiration legal-status Critical
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
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/10—Suction rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/02—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/15—Roller assembly, particular roller arrangement
    • B65H2404/152—Arrangement of roller on a movable frame
    • B65H2404/1521—Arrangement of roller on a movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/33—Rotary suction means, e.g. roller, cylinder or drum
    • B65H2406/334—Rotary suction means, e.g. roller, cylinder or drum arranged on movable frame

Definitions

  • a gripping device provided on the periphery of the delivery roller is equipped with a stop, against which an edge of the sheet is pushed by virtue of the relative movement between the delivery roller and the suction roller.
  • the slight compression of the sheet against the stop ensures correct positioning of the sheet on the delivery roller, which position is maintained by means of the gripping device.
  • the present invention relates to an apparatus for picking up and feeding individual sheets from a stack of sheets.
  • the invention is particularly useful for the picking up and feeding of sheets of paper in printing and duplicating machines.
  • the sheets are picked up from the top of a stack by means of suction elements, preferably suction pads fitted on a rod, and, by a cam-controlled movement of the suction-pad rod, are passed into the zone of a number of gripping devices of a roller, which gripping devices seize the sheets and draw them into the machine after they have been released by the suction pads.
  • suction elements preferably suction pads fitted on a rod
  • German Pat. Spec. No. 1,084,737 describes an apparatus for picking up and feeding blank sheets, in particular labels, which apparatus has a particularly high pick-up speed.
  • the sheet is seized from the bottom of a stack by a suction pick-up roller and, while this roller is moving towards the end of the sheet and is rotating, the sheet is passed around the roller until it is seized by a delivery roller and pulled away from beneath the stack, while the suction pick-up roller is moving back to its original position to pick up the next sheet.
  • the sheets are held on the delivery roller by means of a vacuum which can be applied to the sheets through passages in the delivery roller, and which can be maintained or relaxed depending upon the angular position of the delivery roller.
  • the present invention seeks to effect a rapid transfer such as is achieved in the apparatus of German Pat. Spec. No. 1,084,737 in the case of offset printing and duplicating machines.
  • an apparatus for picking up and feeding individual sheets from a stack of sheets including a rotatable delivery roller, a rotatable pick-up roller having a plurality of radially directed suction passages disposed along a generator thereof for engaging the bottom sheet of the stack of sheets at a point adjacent an edge thereof and feeding the sheet to the delivery roll, and means for swinging the axis of rotation of the pick-up roller backwards and forwards about the axis of rotation of the delivery roller.
  • the arrangement is such that, at the instant the pick-up roller engages the bottom sheet during use of the apparatus, the axis of rotation of the pick-up roller is moving in the same direction as the delivery roller.
  • At least one gripping device is provided on the periphery of the delivery roller for holding the sheet being fed thereto. Stop means are provided on the gripping device for locating the leading edge of the sheet being fed into the gripping device by the pick-up roller and against which, during use of the apparatus, such edge of the sheet is pushed under a compressive bias by the pick up-roller.
  • each sheet can be moved into the open gripping device on the delivery roller and against the stop means for the purpose of achieving accurate placement, and at the same time compensating for faulty positioning of shee in the stack container.
  • the or each gripping device is preferably fitted on the periphery of the delivery roller and pivots about a spindle extending parallel with the generator of the delivery roller upon actuation by a cam control mechanism.
  • the cam control mechanism is so designed that the gripping device of the delivery roller closes when the forward edge of sheet has reached the stop means in the open gripping device.
  • FIG. 1 is a general view of the apparatus for picking up and feeding stacked blank sheets
  • FIG. 2 shows the apparatus in the position in which pick-up by suction is taking place
  • FIG. 3 shows the apparatus in the transfer position, the gripping device being open
  • FIG. 4 is a view, on a larger scale, of a portion of the apparatus illustrated in FIG. 3.
  • FIG. 1 shows the different positions that the apparatus of the invention can occupy.
  • Rotation of a crank disc 1 causes a pick-up or suction roller to be moved backwards and forwards over the periphery of a delivery roller 7, by way of a connecting rod 3 and a rocker 4, rocker 4 being pivoted about the rotational axis of delivery roller 7.
  • the suction roller 5 is caused to move over the delivery roller 7 in a positive rolling movement by means of toothed wheels (not illustrated) fitted between the suction roller and the delivery roller.
  • the crank disc 1 and the delivery roller 7 are driven in the same direction by means of toothed belts, chains or the like.
  • FIG. 1 In order to clearly explain the operation of the apparatus, some of the various positions of the mechanism are shown in FIG. 1 and indicated by the letters S, U, rT and IT.
  • the suction roller 5 In the position S, the suction roller 5 is in the sheet pick-up position and a vacuum is applied through the passage 8 in the suction roller and through a plurality of radially directed passages 9 disposed along a generator of the peripheral surface of the suction roller to pick up the bottom sheet from a stack 10 of sheets.
  • the mechanism is arranged so that, during the period during which each sheet is picked off the bottom of stack 10, the speed at which the suction roller moves over the delivery roller is equal to one half the peripheral speed of the delivery roller.
  • the forward edge of the sheet is introduced into a number of open grippers 6 on the delivery roller, which grippers close when the forward edge of the sheet has reached a stop 12, the vacuum at the same time being cut off.
  • the apparatus then passes through the positions r and IT, and picks up the next sheet at the position S.
  • FIG. 2 shows the apparatus of the invention for picking up and feeding stacked blank sheets in the sheet pick-up position designated by the letter S in FIG. 1.
  • the sheet to be picked up is not seized directly at its edge but at a point which is offset inwardly through a certain distance, so that the edge of the picked up sheet extends tangentially beyond the suction roller.
  • each gripper 6 is at the point in time located forwardly of the point of contact between the suction and delivery rollers taken in the direction of rotation of the delivery roller, at the moment at which the sheet is being transferred to the delivery roll, at which point of contact the passages 8 in the suction roller are located at that moment.
  • the distance between the passage 8 in the suction roller and the stop 12 on the gripper 6 of the delivery roller must be somewhat less than the length of the end portion of the picked up sheet extending tangentially beyond the suction roller. Because of this, when the forward edge of the sheet is pushed against the stop or stops 12, the sheet curves slightly upwards by an amount depending upon the oversize on length (see FIG. 4). This curvature represents the extent to which it is possible to compensate for errors in the distance between the forward edge of the sheet and the stops when positioning the sheet. The sheet is therefore moved against the stop or stops under a compressive bias.
  • the grippers 6 of the delivery roller close against a backing element 11, so that the sheet 13 is held firmly between the backing element l1 and the grippers 6 of the delivery roller.
  • the grippers 6 on the delivery roller are mounted on a spindle 14 which ia disposed at the periphery of the delivery roller and parallel with one of its generators.
  • the grippers can be spring-biased towards the closed position, whereas the spindle 14, mounted at the endfaces of the delivery roller, is acted upon through levers by a cam-control mechanism which causes the grippers to open and close in dependence upon the angular position of the delivery roller.
  • the cam-control mechanism for the grippers on the delivery roller is not illustrated in the drawings.
  • a plurality of grippers are distributed along the spindle 14 over the width of the delivery roller, so that the sheet is held in a uniform manner over its entire width.
  • annular channels are formed at the appropriate places on the suction roller as indicated at 15 in FIG. 4.
  • An apparatus for picking up and feeding individual sheets from a stack of sheets comprismg:
  • a pick-up roller mounted about the periphery of said delivery roller, said pick-up roller being rotatable about an axis of rotation thereof, said pick-up roller having therein a plurality of radially directed suction passages opening onto the peripheral surface of said pick-up roller along a line forming a generator of said peripheral surface of said pick-up roller;
  • At least one gripping device means provided on the periphery of said delivery roller for receiving and gripping a sheet being fed thereto by said pick-up roller;

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US344556A 1972-10-20 1973-03-26 Apparatus for picking up and feeding individual sheets from a stack of sheets Expired - Lifetime US3861667A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2252302A DE2252302A1 (de) 1972-10-20 1972-10-20 Vorrichtung zum entnehmen und weitergeben gestapelter blattartiger zuschnitte

Publications (1)

Publication Number Publication Date
US3861667A true US3861667A (en) 1975-01-21

Family

ID=5860024

Family Applications (1)

Application Number Title Priority Date Filing Date
US344556A Expired - Lifetime US3861667A (en) 1972-10-20 1973-03-26 Apparatus for picking up and feeding individual sheets from a stack of sheets

Country Status (14)

Country Link
US (1) US3861667A (de)
JP (1) JPS5219482B2 (de)
AR (1) AR193915A1 (de)
AT (1) AT327239B (de)
BE (1) BE794145A (de)
CH (1) CH542775A (de)
DD (1) DD101640A5 (de)
DE (1) DE2252302A1 (de)
DK (1) DK134897C (de)
FR (1) FR2204184A5 (de)
GB (1) GB1380866A (de)
IT (1) IT977468B (de)
NL (1) NL7300469A (de)
SE (1) SE387311B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359216A (en) * 1979-08-06 1982-11-16 R. J. Reynolds Tobacco Company Flexible sheet feeding mechanism
US4688782A (en) * 1984-12-13 1987-08-25 Xerox Corporation Vertical vacuum corrugation feeder
US5249789A (en) * 1990-10-22 1993-10-05 Siemens Aktiengesellschaft Sheet film magazine for a film changer
US5642878A (en) * 1995-05-04 1997-07-01 F. L. Smithe Machine Company, Inc. Method and apparatus for separating sheets fed from the bottom of a stack
US5772200A (en) * 1995-04-26 1998-06-30 Sorensen; Alan M. Feeder for sheet form elements
WO2001032539A1 (de) * 1999-11-02 2001-05-10 Ferag Ag Verfahren und vorrichtung zum abtransportieren von flächigen erzeugnissen
US6464414B1 (en) 2000-03-21 2002-10-15 Lexmark International, Inc. Print media sensor adjustment mechanism
US6502814B2 (en) * 2000-06-30 2003-01-07 Focke & Co. (Gmbh & Co.) Apparatus for handling blanks in packaging machines
CN100357166C (zh) * 2004-05-25 2007-12-26 大日本网目版制造株式会社 板捡拾设备及其使用方法
US9764570B2 (en) * 2015-07-21 2017-09-19 Canon Kabushiki Kaisha Sheet feeding apparatus
CN107879151A (zh) * 2017-12-11 2018-04-06 浙江星锋智能设备有限公司 一种翻纸机及其纸张进料机构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH607977A5 (en) * 1976-06-18 1978-12-15 Fritz Lang Device for removing paper sheets from a stack, in particular on a folding machine
DE3808651C2 (de) * 1988-03-15 1997-12-04 Hoerauf Michael Maschf Vorrichtung zum Ergreifen und Vereinzeln des unteren Zuschnittes eines Stapels von Zuschnitten aus kaschiertem Papier o. dgl., insbesondere für eine Buchdeckenmaschine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3536321A (en) * 1968-06-13 1970-10-27 Planeta Veb Druckmasch Werke Device for clamping sheet material
US3623720A (en) * 1969-11-20 1971-11-30 Virey & Garnier Etiquetage High-speed labelling machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3536321A (en) * 1968-06-13 1970-10-27 Planeta Veb Druckmasch Werke Device for clamping sheet material
US3623720A (en) * 1969-11-20 1971-11-30 Virey & Garnier Etiquetage High-speed labelling machine

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359216A (en) * 1979-08-06 1982-11-16 R. J. Reynolds Tobacco Company Flexible sheet feeding mechanism
US4688782A (en) * 1984-12-13 1987-08-25 Xerox Corporation Vertical vacuum corrugation feeder
US5249789A (en) * 1990-10-22 1993-10-05 Siemens Aktiengesellschaft Sheet film magazine for a film changer
US5772200A (en) * 1995-04-26 1998-06-30 Sorensen; Alan M. Feeder for sheet form elements
US5642878A (en) * 1995-05-04 1997-07-01 F. L. Smithe Machine Company, Inc. Method and apparatus for separating sheets fed from the bottom of a stack
AU775234B2 (en) * 1999-11-02 2004-07-22 Ferag Ag Method and device for dispatching flat products
US6666447B2 (en) 1999-11-02 2003-12-23 Ferag Ag Method and device for transporting flat products away
WO2001032539A1 (de) * 1999-11-02 2001-05-10 Ferag Ag Verfahren und vorrichtung zum abtransportieren von flächigen erzeugnissen
US6464414B1 (en) 2000-03-21 2002-10-15 Lexmark International, Inc. Print media sensor adjustment mechanism
US6502814B2 (en) * 2000-06-30 2003-01-07 Focke & Co. (Gmbh & Co.) Apparatus for handling blanks in packaging machines
CN100357166C (zh) * 2004-05-25 2007-12-26 大日本网目版制造株式会社 板捡拾设备及其使用方法
US9764570B2 (en) * 2015-07-21 2017-09-19 Canon Kabushiki Kaisha Sheet feeding apparatus
CN107879151A (zh) * 2017-12-11 2018-04-06 浙江星锋智能设备有限公司 一种翻纸机及其纸张进料机构
CN107879151B (zh) * 2017-12-11 2023-09-12 浙江星锋智能设备有限公司 一种翻纸机及其纸张进料机构

Also Published As

Publication number Publication date
FR2204184A5 (de) 1974-05-17
DE2252302A1 (de) 1974-05-02
ATA264973A (de) 1975-04-15
DK134897C (da) 1977-06-27
GB1380866A (en) 1975-01-15
CH542775A (de) 1973-10-15
IT977468B (it) 1974-09-10
AR193915A1 (es) 1973-05-31
JPS5219482B2 (de) 1977-05-28
AT327239B (de) 1976-01-26
SE387311B (sv) 1976-09-06
DK134897B (da) 1977-02-07
BE794145A (fr) 1973-05-16
DD101640A5 (de) 1973-11-12
JPS4973211A (de) 1974-07-15
NL7300469A (de) 1974-04-23

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Legal Events

Date Code Title Description
AS Assignment

Owner name: NORFIN GRAPHISCHE PRODUKTE GMBH, WUERZBERGER STRAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JAHME, HANS J.;REEL/FRAME:004581/0581

Effective date: 19860418

Owner name: NORFIN GRAPHISCHE PRODUKTE GMBH,GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JAHME, HANS J.;REEL/FRAME:004581/0581

Effective date: 19860418

AS Assignment

Owner name: NEUE ROTAPRINT GMBH, NEUE ROTAPRINT GMBH, REINICKE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:NORFIN GRAPHISCHE PRODUKTE GMBH;REEL/FRAME:004709/0349

Effective date: 19870330