FR2391944A1 - DEVICE FOR REMOVING SHEETS ONE BY ONE FROM A STACK, ON A PRINTING MACHINE OR SIMILAR MACHINE - Google Patents

DEVICE FOR REMOVING SHEETS ONE BY ONE FROM A STACK, ON A PRINTING MACHINE OR SIMILAR MACHINE

Info

Publication number
FR2391944A1
FR2391944A1 FR7815636A FR7815636A FR2391944A1 FR 2391944 A1 FR2391944 A1 FR 2391944A1 FR 7815636 A FR7815636 A FR 7815636A FR 7815636 A FR7815636 A FR 7815636A FR 2391944 A1 FR2391944 A1 FR 2391944A1
Authority
FR
France
Prior art keywords
suction
stack
machine
sheet
vacuum
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
Application number
FR7815636A
Other languages
French (fr)
Other versions
FR2391944B1 (en
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.)
Rotaprint GmbH
Original Assignee
Rotaprint GmbH
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 Rotaprint GmbH filed Critical Rotaprint GmbH
Publication of FR2391944A1 publication Critical patent/FR2391944A1/en
Application granted granted Critical
Publication of FR2391944B1 publication Critical patent/FR2391944B1/fr
Granted legal-status Critical Current

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
    • B65H3/0883—Construction of suction grippers or their holding devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

Ce dispositif est du type à ventouses déplaçables entre le haut de la pile et un système de transport de feuilles. Selon l'invention, les ventouses sont branchées en série et contiennent chacune un piston 2 qui réduit l'orifice d'aspiration 18 dans le pied 4 par un embout 24 lorsqu'il est abaissé, contre un ressort 3, par la dépression accrue dans l'espace à vide 22 au moment de l'aspiration de la feuille 23 contre la surface de base 13. L'abaissement du piston réduit la quantité d'air aspirée après l'application de la feuille contre la ventouse et libère en même temps la transmission de la dépression par la tubulure 7 et le tuyau 20 à la ventouse 1' suivante.This device is of the type with suction cups movable between the top of the stack and a sheet transport system. According to the invention, the suction cups are connected in series and each contain a piston 2 which reduces the suction port 18 in the foot 4 by a nozzle 24 when it is lowered, against a spring 3, by the increased vacuum in the vacuum space 22 at the time of the suction of the sheet 23 against the base surface 13. The lowering of the piston reduces the amount of air sucked after the application of the sheet against the suction cup and at the same time releases the transmission of the vacuum through the pipe 7 and the pipe 20 to the following suction cup 1 '.

FR7815636A 1977-05-25 1978-05-25 DEVICE FOR REMOVING SHEETS ONE BY ONE FROM A STACK, ON A PRINTING MACHINE OR SIMILAR MACHINE Granted FR2391944A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2723663A DE2723663C3 (en) 1977-05-25 1977-05-25 Device for separating sheets of a stack of sheets for a printing press and the like.

Publications (2)

Publication Number Publication Date
FR2391944A1 true FR2391944A1 (en) 1978-12-22
FR2391944B1 FR2391944B1 (en) 1982-02-05

Family

ID=6009858

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7815636A Granted FR2391944A1 (en) 1977-05-25 1978-05-25 DEVICE FOR REMOVING SHEETS ONE BY ONE FROM A STACK, ON A PRINTING MACHINE OR SIMILAR MACHINE

Country Status (5)

Country Link
JP (1) JPS53147371A (en)
DE (1) DE2723663C3 (en)
FR (1) FR2391944A1 (en)
GB (1) GB1598114A (en)
IT (1) IT1095907B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4804173A (en) * 1985-06-03 1989-02-14 Roberts Corporation Method and apparatus for moving individual sheets from a stack of sheets
JPH01174911U (en) * 1988-05-31 1989-12-13
DE3938556C2 (en) * 1989-11-21 1996-09-05 Heidelberger Druckmasch Ag Suction head for the feeder of a sheet-fed rotary printing machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1085893B (en) * 1958-10-14 1960-07-28 Georg Spiess Dr Ing Transport device with suction nozzle for separating the sheets in sheet feeders

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NV700/64 *

Also Published As

Publication number Publication date
DE2723663B2 (en) 1980-11-13
IT1095907B (en) 1985-08-17
DE2723663C3 (en) 1981-08-06
IT7823709A0 (en) 1978-05-23
GB1598114A (en) 1981-09-16
JPS5617260B2 (en) 1981-04-21
JPS53147371A (en) 1978-12-22
FR2391944B1 (en) 1982-02-05
DE2723663A1 (en) 1978-11-30

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse