US3336026A - Sheet feeding arrangement for a sheet printing machine - Google Patents

Sheet feeding arrangement for a sheet printing machine Download PDF

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Publication number
US3336026A
US3336026A US430040A US43004065A US3336026A US 3336026 A US3336026 A US 3336026A US 430040 A US430040 A US 430040A US 43004065 A US43004065 A US 43004065A US 3336026 A US3336026 A US 3336026A
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US
United States
Prior art keywords
sheet
nozzle
sheets
aligning
aligning means
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
US430040A
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English (en)
Inventor
Preuss Friedrich
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 US3336026A publication Critical patent/US3336026A/en
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
    • 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
    • B65H5/14—Details of grippers; Actuating-mechanisms therefor
    • 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
    • B65H3/14—Air blasts producing partial vacuum
    • 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
    • B65H9/14—Retarding or controlling the forward movement of articles as they approach stops

Definitions

  • the invention relates to a device for introducing a blanket under the cover means of a sheet aligning device of a sheet printing press, in which a suction nozzle moved longitudinally of the sheet path and below the plane of the sheet applies suction to the sheet in the vicinity of a sheet edge and introduces it below the cover means.
  • the suction nozzle has to be operated with high vacuum in order to be able to reliably engage the edge regions of sheets of heavy card which may lie in a wavy manner.
  • this leads to considerable difficulties in the handling of thin porous paper, since the suction also acts through the pores onto the next sheet, so that the normal sheet transport of single sheets is disturbed. This is especially disadvantageous in connection with the advance straightening of sheets fed in stacked form to the printing press.
  • suction nozzle operates below the sheet plane and its suction openings must accordingly be upwardly open.
  • foreign bodies adhering to the sheets, more particularly powder fall into the suction nozzle, so that it rapidly becomes blocked and has to be cleaned at short intervals.
  • FIG. 1 is a side elevation of the feed table of a sheet printing press
  • FIG. 2 is a longitudinal sectional view of a blast suction nozzle
  • FIG. 3 is an end elevation of the nozzle of FIG. 2;
  • FIG. 4 is a plan View of the nozzle of FIG. 2;
  • FIG. 5 is a plan view of a modified nozzle.
  • the sheets are fed from a stack 1 in known manner over a feed table 2 to front edge guides or .front lays 3, from where they are taken over in the aligned condition by a swing gripper 4 and are then transferred to grippers 5 of a printing cylinder 6. Additional likewise known preliminary stops 7 are provided which, below the sheet fed to the printing cylinder '6 by the gripper 4, slow down the next succeeding sheet and feed it in 3,336,026 Patented Aug. 15, 1967 thealigned condition to the front lays 3.
  • the preliminary stops 7 are arranged on a slide 8 which is moved forward and backwards by means of a cam disc 9, a roller lever 10, a spring 11 and a rod 12 in accordance with the cycle of the press on a guide 15 which can be raised and lowered about a bearing 14 by means of a cam disc 13.
  • the preliminary aligning means shown as stops 7 are pivotally mounted on reciprocating slide 8 and comprise a generally L-shaped portion.
  • One arm 70 of this portion protrudes above the level of the table in the illustrated position of the stop and the other arm 7b extends in said position parallel to the table and in opposition to the direction of travel of the sheets thereby forming a cover portion.
  • Slide 8 further mounts a suction means 16.
  • This suction means includes a nozzle 19 connected by a stud 18 and a hose 17 to a suitable source of pressurized air (not shown).
  • the nozzle extends generally parallel to the plane of table 2.
  • the nozzle includes a guide mem ber 21 which extends below a discharged opening 20 to guide the air stream emerging from the nozzle.
  • the air stream is further laterally guided by guides 22 as is shown in FIG. 4.
  • the air stream discharged from the nozzle arrangement according to FIG. 4 is shaped somewhat in the manner of a ribbon.
  • FIG. 5 shows a modified nozzle 16a in which the air stream is divided into three diverging streams by appropriately oriented guides 23.
  • a sheet-feeding device of a sheet-printing press to which sheets are successivley fed from a stack of sheets comprising, in combination:
  • a feed table for guiding the sheets from the stack to the press
  • a sheet-aligning means engageable with the leading edge of a sheet moving on said table toward the press, said aligning means having a portion adapted to protrude above the level of the table and terminating in a cover portion extending in opposition to the direction of travel of the sheet on the table;
  • nozzle means disposed substantially parallel to the plane of the table, said nozzle means being connectible to a supply of compressed air for producing a stream of air, the suction generated by said stream adjacent thereto sucking the leading edge of the sheet on the table below the cover portion and into engagement with said protuding portion of the aligning means;
  • reciprocating support means for said aligning means and said nozzle means said support means including a slide mounting said aligning means and said nozzle means, and guide and drive means reciprocating said slide parallel to the plane of the table for controlling the speed of movement of the sheet in reference to the table and aligning the sheet against said protruding portion of the aligning means.
  • a sheet-feeding device according to claim 1, wherein said nozzle means includes lengthwise internal guide means for directing said air stream parallel to the plane of the table and toward the leading sheet edge when said edge has passed said nozzle means on its way to the aligning means.
  • a sheet-feeding device according to claim 2, wherein said nozzle means includes further lengthwise internal guide means for limiting the width of the air flowing through the nozzle means.
  • a sheet-feeding device according to claim 1, wherein said nozzle means includes guide means defining several divergent duets for dividing the air flowing through the nozzle means into several divergent air streams.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Pile Receivers (AREA)
US430040A 1964-02-27 1965-02-03 Sheet feeding arrangement for a sheet printing machine Expired - Lifetime US3336026A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER0037317 1964-02-27

Publications (1)

Publication Number Publication Date
US3336026A true US3336026A (en) 1967-08-15

Family

ID=7405172

Family Applications (1)

Application Number Title Priority Date Filing Date
US430040A Expired - Lifetime US3336026A (en) 1964-02-27 1965-02-03 Sheet feeding arrangement for a sheet printing machine

Country Status (3)

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US (1) US3336026A (de)
CH (1) CH425836A (de)
GB (1) GB1086574A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593990A (en) * 1967-07-12 1971-07-20 Glaverbel Method and apparatus for supporting sheet material
US3624807A (en) * 1968-05-24 1971-11-30 Mabeg Maschinenbau Gmbh Nachf Sheet-conveying device
US3656744A (en) * 1970-03-13 1972-04-18 Usm Corp Sheet registering mechanism
US3870293A (en) * 1972-09-20 1975-03-11 Roland Offsetmaschf Device for aligning the sheets on the feed table of sheet-fed machines, particularly offset printing presses
WO1987000822A1 (en) * 1985-08-02 1987-02-12 Corrugated Paper Machinery Corporation Sheet transfer device
US4660819A (en) * 1984-09-27 1987-04-28 Xerox Corporation Automatic restacking registration in a recirculating document handler
US20120288309A1 (en) * 2011-05-13 2012-11-15 Fuji Xerox Co., Ltd. Sheet transporting device and image forming apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1595478A (en) * 1920-05-25 1926-08-10 Minton Ogden Method of stripping and feeding paper and apparatus
US2317993A (en) * 1941-03-15 1943-05-04 Harris Seybold Potter Co Sheet feeder
US2613930A (en) * 1948-11-12 1952-10-14 Backhouse Headley Townsend Sheet registering apparatus
US3158367A (en) * 1959-10-23 1964-11-24 Burroughs Corp Pneumatic sheet separator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1595478A (en) * 1920-05-25 1926-08-10 Minton Ogden Method of stripping and feeding paper and apparatus
US2317993A (en) * 1941-03-15 1943-05-04 Harris Seybold Potter Co Sheet feeder
US2613930A (en) * 1948-11-12 1952-10-14 Backhouse Headley Townsend Sheet registering apparatus
US3158367A (en) * 1959-10-23 1964-11-24 Burroughs Corp Pneumatic sheet separator

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593990A (en) * 1967-07-12 1971-07-20 Glaverbel Method and apparatus for supporting sheet material
US3624807A (en) * 1968-05-24 1971-11-30 Mabeg Maschinenbau Gmbh Nachf Sheet-conveying device
US3656744A (en) * 1970-03-13 1972-04-18 Usm Corp Sheet registering mechanism
US3870293A (en) * 1972-09-20 1975-03-11 Roland Offsetmaschf Device for aligning the sheets on the feed table of sheet-fed machines, particularly offset printing presses
DE2246140C2 (de) * 1972-09-20 1981-05-14 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum Trennen teilweise überdeckter Bogen am Anlegetisch von Bogen verarbeitenden Maschinen, insbesondere Offsetmaschinen
US4660819A (en) * 1984-09-27 1987-04-28 Xerox Corporation Automatic restacking registration in a recirculating document handler
WO1987000822A1 (en) * 1985-08-02 1987-02-12 Corrugated Paper Machinery Corporation Sheet transfer device
US20120288309A1 (en) * 2011-05-13 2012-11-15 Fuji Xerox Co., Ltd. Sheet transporting device and image forming apparatus
US8814161B2 (en) * 2011-05-13 2014-08-26 Fuji Xerox Co., Ltd. Sheet transporting device and image forming apparatus with regulating member and first transport member moving together

Also Published As

Publication number Publication date
CH425836A (de) 1966-12-15
GB1086574A (en) 1967-10-11

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