US2940387A - Sheet delivery means for rotary printing press - Google Patents

Sheet delivery means for rotary printing press Download PDF

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Publication number
US2940387A
US2940387A US756357A US75635758A US2940387A US 2940387 A US2940387 A US 2940387A US 756357 A US756357 A US 756357A US 75635758 A US75635758 A US 75635758A US 2940387 A US2940387 A US 2940387A
Authority
US
United States
Prior art keywords
cylinder
sheet
delivery
impression
cylinders
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
US756357A
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English (en)
Inventor
Howard A Pritchard
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.)
Harris Graphics Corp
Original Assignee
Harris Intertype Corp
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 Harris Intertype Corp filed Critical Harris Intertype Corp
Priority to US756357A priority Critical patent/US2940387A/en
Priority to GB28009/59A priority patent/GB892700A/en
Priority to DEH37207A priority patent/DE1152425B/de
Priority to FR803195A priority patent/FR1232864A/fr
Application granted granted Critical
Publication of US2940387A publication Critical patent/US2940387A/en
Anticipated expiration legal-status Critical
Assigned to HARRIS GRAPHICS CORPORATION reassignment HARRIS GRAPHICS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HARRIS CORPORATION
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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/041—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands and introducing into a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/042—Intermediate conveyors, e.g. transferring devices

Definitions

  • This invention relates. to improvements in sheet delivery, i.e., delivery from a printing press. or other high speed sheet handling machine. In particular it relates to delivery from printing presses in whicha sheet is printed for each revolution of the impression cylinder of the press.
  • the impression cylinder which may be the last impression cylinder in the. case of a multi-unit press, by meansof a chain conveyor equipped with gripper assemlies which grip each sheetv as it leaves the. impression cylinder and carry the forward end over a delivery pile support, the grippers being opened at the proper time to deposit the sheet on the pile,
  • the delivery conveyor may comprise a. pair of sprockets over which the conveyor chains run, the arrangement being such that the gripper pads of the gripper assemblies move in a curved path that meets the surface of the impression cylinder.
  • the diameter of the delivery cylinder about which the gripper assemblies travel has been the' same as the diameter of the impression cylinder and these cylinders have been rotated one to one.
  • the diameter oi the delivery cylinder isdouble that of the impression cylinder.
  • the printed side of the sheet is toward the delivery cylinder.
  • the distance between the pointV where the front edge of the sheet passes through the line of print and the point where the front edge f the sheet moves tangentially away from the delivery cylinder as the chains move away from their sprockets is relatively short as compared tothe length of a full length sheet being printed.
  • the gripping portions of the sheet grippers travel faster in the circular portion of their path about the delivery cylinder than after leaving the cylinder sprockets owing to the fact that pitch lines of the chain sprockets are smaller in diameter than the arcuate paths of the sheet gripping portions of the grippers and the sheet line.
  • the reduced speed of the front edge may permit the rear portion of the sheet to cling to the ink on the printing cylinder somewhat past theline of print, thereby causing the sheet to move relative to the surface ci' the delivery cylinder, resultingV in smudging of the printed image.
  • the delivery cylinder is positioned in a manner to avoid this eect the general design of the nted States Patent 0 siderably, but alsov adds, to the expense of the entire mechanism.
  • the delivery cylinder is of a diameter twice that ofA theimpression cylinders, as in thepresent invention, the diihcultis. experienced, as, ⁇ above noted, are avoided.
  • the sprockets may be made smaller in diameterA than the surfaceA of thedelivery cylthe tail end'of the -sheet will ⁇ still pass through the print line beforeV the frontend begins itstravel onthe straig'ritaway because of theA relatively long path around the double size delivery cylinder.
  • it isv not necessary to resort to sprocketshaving a. radius the same as that of the cylinder surface in order to avoid the speed change at the. time the front edge. of the sheet enters the straightaway, because with ⁇ the larger size delivery cylinder the speed' change will,r come after the teil end ofthe sheet passesthe line of print.
  • One object of the invention isthe provision or a. sheet delivery means wherein the delivery cylinder is twice the diameter of the impression cylinder, and a nih-surface delivery cylinder is., so. constructed as ⁇ to cause a minirnurnamount of oifsettiugand smudging of the printed' side ofthesheetwhich faces the cylinder.
  • Another object is ⁇ theY provision of asheet delivery in which marking.. or smudgingofthe sheets resulting from the change, of speedf of ⁇ the, sheet ⁇ as the forward edgeA thereof entersjhe straightaway ⁇ of the conveyor, is. avoided.
  • Another object is to. provide. a printing press delivery. having an endlesschain conveyor,- passing around. a; delivery cylinder of'tWice the diameter. of the impression, cylinder of the press, whereby the. full length of, the
  • Another object is to permit ⁇ the use of, ⁇ delivery, cylinder sprockets of lesser diameter than the delivery cylinder diameter, without the, position of the delivery cylinder about its impressioncyl-inder being controlled by the length of the sheets, andwithout a change inI speedV between the leading andV tail. edges oi the sheet. while the sheet is undergoing printing.
  • An ancillary object is topermit use. of, such sprockets. while still employing a cylinder. having, a., full, surface.
  • Still another object. is. the, provisionY oi' asheet deliveryY for a multicolor printing press. having double sizel transfer'cylinders in whichthe.4 delivery cylinder is the same size as the transfer cylinders and may. be mounted, in. the frame of the machine to bear the same relation tothe last impression cylinder as each transfer cylinder bears ⁇ to the preceding impression cylinder, thereby promoting efficiency and. economy in construction.
  • Fig. 1 - is a sidev elevation of a multicolor offset printing press equipped with ak sheet;l delivery constructed in accordance with the invention
  • Fig. 2 is a 4fragmental, elevational view on a larger scale showing the delivery cylinder and chain conveyor,v
  • each of these cylindersY being of the Ysame size, as isthe usual practice.
  • the sheet delivery'of the'present invention'departs comprises in its pre'- ferred form frame members 21', similar in al1 essential respects'to the framemembers V21 for the ,transferlcylin- Y ders.
  • V a printing unit embodying an Aimpression cylinder adapted to receive a'sheet.- for each revolution'thereof and carry 'it through a printing station, and delivery means for receiving sheets from the im- -V pression cylinder comprising a sheet delivery'cylinde'r in cylinder.
  • The,construction and erection of the completeV Y machine is thereby simplified, and the cost maintained Y proportionately low.
  • a deliveryicylinder Y or Ydrum 26,' which may have a continuous surface 'rather thanone made up'of a series of disks with' sharp teeth to' berpresented ⁇ to the sheets, as Iis common where the transferring relation with Ythefirnpression cylinder andv of a diameter Vwhich is a nftultipleV of the'diameter of said impression cylinder, sprockets turning with said delivery Y cylinder, anrendless conveyorV comprising chains-running n on said sprockets, and a plurality of gripper'v assemblies delivery cylinder is of the same sizeras theimpression Y cylinders;
  • the Vdrum '26 is, of course, keyed to the shaft '22. ⁇ It is driven by gear 27 on the last impression cylin'- Y der 18, the teeth of which mesh with the teeth of aY gear 2,8 on the shaft Z2'.
  • the lchains run substantiallyV horizontally over a delivery pile support 40 to deposit sheets thereon in the usual manner.
  • a series of gripper assemblies generally designated 32,' each assembly comprising a rod 33 carrying arseries of grippers 34 Yand a rod 35 carrying a like number of, gripper pads 36.
  • Each rod 33V is rockedby an arm 37, the free end j of which carries a small wheel or roller 38 that isadapted torrengage a fixed cam 39,-whichjcontrolsropening and closing ofthe grippers 34.
  • the cam 39 is, of course, so
  • each set of the delivery grippersV 34 in turn to accepta sheet from the grippers 25 on the impression cylinder when the latter come into transferring position, that is, whenever theycross the plane con- Y necting the two shafts 1'5 andr22.
  • VThe line ofrprnt between the blanketfand impression cylinders of the ,last unit isindicatedzat P inrFig. 1.
  • "The line at'which the front edge of. ⁇ a sheet,” after'being im-Y printed, leaves the curved surface ofthe delivery cylinder Iand starts on -what may be termed the straightawayV p 'of the conveyonl is indicated-at S.
  • the distance between these two points along y,the curved path which the sheet must' travel is considerably greater than the length of a sheet which canbe printed onrthe working surface of theY impression cylinderl 18.
  • a'sheet fed'printing press in combination, a plurality of same size impressionV cylinders each'having a Yset of sheet grippersand a gap and adapted to receive Asheets on yan impression surface extending from the grip- Y pers around the cylinder'to the gap, a transfer cylinder cooperating with and located between successive impres# Vslon cylinders," said'transfer-cylinders being twice Ythe diameter of the impression cylinders and each of said transfer cylinders having two ⁇ sets of gppers spaced 180 Y apart thereon, a printing cylinder cooperating withfeach impression cylinder, Vanddelivery meansv comprising an endless conveyor -for taking sheets from-the last impression cylinder. and transferring them to a delivery pile support and vfurther comprising a' delivery cylinder ofthe sames1zeV as Vthe transferycylindersand havingssprocrkets at its ends about'which. the endless conveyor travels,land
  • said endless conveyor carryingfgrippervassemblies for receiving sheets from thelast impression Acylinder and coni Y veying .them ,forward at printing speed throughout the timethat the sheets are ,beingprnted by the last impressioncylinder, the Vdistance along the sheet path betweenl Ythe point atV which 4said, endless,A conveyor leaves the delivery cylinder and the line'vofprint between the last impression' and Y.printingcylinders being greater. than the length of the maximum lsize sheet to be handled by the s press, whereby the tail of the sheet will have passed said line of print before the gripper assembly holding its leading edge has left the delivery cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
US756357A 1958-08-21 1958-08-21 Sheet delivery means for rotary printing press Expired - Lifetime US2940387A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US756357A US2940387A (en) 1958-08-21 1958-08-21 Sheet delivery means for rotary printing press
GB28009/59A GB892700A (en) 1958-08-21 1959-08-17 A printing press
DEH37207A DE1152425B (de) 1958-08-21 1959-08-18 Druckerpresse
FR803195A FR1232864A (fr) 1958-08-21 1959-08-20 Presse à imprimer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US756357A US2940387A (en) 1958-08-21 1958-08-21 Sheet delivery means for rotary printing press

Publications (1)

Publication Number Publication Date
US2940387A true US2940387A (en) 1960-06-14

Family

ID=25043119

Family Applications (1)

Application Number Title Priority Date Filing Date
US756357A Expired - Lifetime US2940387A (en) 1958-08-21 1958-08-21 Sheet delivery means for rotary printing press

Country Status (4)

Country Link
US (1) US2940387A (de)
DE (1) DE1152425B (de)
FR (1) FR1232864A (de)
GB (1) GB892700A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178981A (en) * 1958-12-22 1965-04-20 Harold E Paulson Perforator attachments for offset presses
US3342129A (en) * 1966-12-19 1967-09-19 Harris Intertype Corp Method and apparatus for electrostatically driving a sheet in a rotary press
US3680481A (en) * 1968-07-06 1972-08-01 Heidelberger Druckmasch Ag Frictional gear backlash eliminating means in sheet fed rotary printer
US3881229A (en) * 1974-06-03 1975-05-06 Grace W R & Co Chain mountable gripper
US3935814A (en) * 1973-02-19 1976-02-03 Miller Printing Machinery Co. Sheet delivery apparatus
US3999480A (en) * 1975-11-05 1976-12-28 Hamada Printing Press Mfg. Co., Ltd. Apparatus for effecting secondary printing in the course of paper delivery in addition to primary printing achieved within the body of an offset printing machine
US4188883A (en) * 1976-12-22 1980-02-19 Veb Polygraph Leipzig Kombinat Fur Polygraphische Maschinen Und Ausrustungen Rotary printing machine
US4409894A (en) * 1981-03-07 1983-10-18 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Rotary offset sheet selective prime, verso or multicolor printing machine and method
US4414896A (en) * 1981-03-07 1983-11-15 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Sheet-fed rotary prime and verso offset printing machine & method
US4596184A (en) * 1984-08-07 1986-06-24 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Printed sheet transport apparatus
EP0412236A3 (en) * 1989-08-07 1991-08-07 Printing Research, Inc. Transfer roller device for printing presses and fabric material therefor
US5341738A (en) * 1992-05-08 1994-08-30 Man Roland Druckmaschinen Ag Device for transporting sheets within a printing machine
US20030218298A1 (en) * 2002-05-23 2003-11-27 Mikihiro Yamakawa Paper stacker for use with image forming apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10157117A1 (de) * 2001-11-21 2003-05-28 Koenig & Bauer Ag Bogenausleger für eine bogenverarbeitende Maschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1875869A (en) * 1929-11-22 1932-09-06 Hense Heinrich Offset printing-press
US2002814A (en) * 1932-01-14 1935-05-28 Harris Seybold Fotter Company Printing-press
US2554904A (en) * 1946-05-25 1951-05-29 Harris Seybold Co Multicolor printing press

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE222839C (de) *
DE346298C (de) * 1916-07-25 1921-12-29 Anglo American Inv S Syndicate Bogenschneidevorrichtung fuer Druckpressen mit Bogenableger
US1977566A (en) * 1933-03-15 1934-10-16 Irving Trust Co Slitting mechanism for printing machines
DE830959C (de) * 1950-03-31 1952-02-07 Faber & Schleicher A G Vorrichtung zum passgerechten Transport von Bogen zwischen zwei Druckwerken

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1875869A (en) * 1929-11-22 1932-09-06 Hense Heinrich Offset printing-press
US2002814A (en) * 1932-01-14 1935-05-28 Harris Seybold Fotter Company Printing-press
US2554904A (en) * 1946-05-25 1951-05-29 Harris Seybold Co Multicolor printing press

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178981A (en) * 1958-12-22 1965-04-20 Harold E Paulson Perforator attachments for offset presses
US3342129A (en) * 1966-12-19 1967-09-19 Harris Intertype Corp Method and apparatus for electrostatically driving a sheet in a rotary press
US3680481A (en) * 1968-07-06 1972-08-01 Heidelberger Druckmasch Ag Frictional gear backlash eliminating means in sheet fed rotary printer
US3935814A (en) * 1973-02-19 1976-02-03 Miller Printing Machinery Co. Sheet delivery apparatus
US3881229A (en) * 1974-06-03 1975-05-06 Grace W R & Co Chain mountable gripper
US3999480A (en) * 1975-11-05 1976-12-28 Hamada Printing Press Mfg. Co., Ltd. Apparatus for effecting secondary printing in the course of paper delivery in addition to primary printing achieved within the body of an offset printing machine
US4188883A (en) * 1976-12-22 1980-02-19 Veb Polygraph Leipzig Kombinat Fur Polygraphische Maschinen Und Ausrustungen Rotary printing machine
US4409894A (en) * 1981-03-07 1983-10-18 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Rotary offset sheet selective prime, verso or multicolor printing machine and method
US4414896A (en) * 1981-03-07 1983-11-15 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Sheet-fed rotary prime and verso offset printing machine & method
US4596184A (en) * 1984-08-07 1986-06-24 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Printed sheet transport apparatus
EP0412236A3 (en) * 1989-08-07 1991-08-07 Printing Research, Inc. Transfer roller device for printing presses and fabric material therefor
US5341738A (en) * 1992-05-08 1994-08-30 Man Roland Druckmaschinen Ag Device for transporting sheets within a printing machine
US20030218298A1 (en) * 2002-05-23 2003-11-27 Mikihiro Yamakawa Paper stacker for use with image forming apparatus
US6991229B2 (en) * 2002-05-23 2006-01-31 Konica Corporation Paper stacker for use with image forming apparatus

Also Published As

Publication number Publication date
FR1232864A (fr) 1960-10-12
DE1152425B (de) 1963-08-08
GB892700A (en) 1962-03-28

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Legal Events

Date Code Title Description
AS Assignment

Owner name: HARRIS GRAPHICS CORPORATION MELBOURNE, FL A DE CO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HARRIS CORPORATION;REEL/FRAME:004227/0467

Effective date: 19830429