US3572683A - Devices for separating folded sheets of paper and the like - Google Patents

Devices for separating folded sheets of paper and the like Download PDF

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Publication number
US3572683A
US3572683A US783593A US3572683DA US3572683A US 3572683 A US3572683 A US 3572683A US 783593 A US783593 A US 783593A US 3572683D A US3572683D A US 3572683DA US 3572683 A US3572683 A US 3572683A
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United States
Prior art keywords
sheet unit
pages
housing
cylinders
separator element
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Expired - Lifetime
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US783593A
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English (en)
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Rudolf Hepp
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Individual
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    • 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
    • B65H5/30—Opening devices for folded sheets or signatures
    • B65H5/305—Opening devices for folded sheets or signatures comprising rotary means for opening the folded sheets
    • B65H5/307—Opening devices for folded sheets or signatures comprising rotary means for opening the folded sheets two opposite rotary means, both having gripping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/43—Gathering; Associating; Assembling
    • B65H2301/435—Gathering; Associating; Assembling on collecting conveyor
    • B65H2301/4351—Gathering; Associating; Assembling on collecting conveyor receiving articles astride thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/45—Folding, unfolding
    • B65H2301/453—Folding, unfolding opening folded material
    • B65H2301/4531—Folding, unfolding opening folded material by opposite opening drums

Definitions

  • the present invention relates to a device for [54] DEVICES FOR SEPARATING FOLDED SHEETS 01F parting folded sheets of material, or assemblies of such sheets, PAPER AND P Q in a manner such that where there are more than two leaves or 5 Claims 12 Drawing Figs pages in the assembly the internally disposed ones may also be [52] US. Cl 270/54 parted in a determinate manner by the creation in them of a [5 l] Int. Cl B65h 5/30 bending stress consequent upon the intermittent introduction [50] Field of Search 270/54, 55 between them of a separator element.
  • Rudolf Hepp By: magma Aiiomey Patented Mrch 30, 1971 2 Sheets-Sheet 2 Inventor: Rudolf Hepp Attorney DEVICES FOR SEPARATING FOLDED SHEETS OF PAPER AND THE LIKE
  • the present invention relates to a method of and a device for, parting individual sheets of paper or the like, or units made up of several sheets.
  • parting folded sheets The function of parting folded sheets, is well known.
  • the sheets are withdrawn individually from a stacking device and, their leading edges being spread apart, are placed upon a conveyor chain which feeds the parted sheets to a further processing stage.
  • a known parting device of this kind consists of two cylinders rotating in mutually opposite directions, which are provided superficially with gripper elements for seizing the leading edges of the pages. Sheets can also be handled which are asymmetrically folded; in this context, one half of the sheet projects somewhat beyond the other half. The projecting edge thus produced, can be gripped by mechanical gripper elements, while the sheets where there is no such projecting part, pneumatic gripper elements are employed.
  • the sheet or sheet unit taken from the stacking device passes with its, or their folded edge in the trailing position, between the two cylinders.
  • the leading edges of the two sheets are seized and with further rotation of the cylinders are spread apart, to be dropped, when the deployment has been completed, so that the spread sheet falls onto a conveyor chain located below.
  • Sheet units of this kind may for example consist of several sheets, of all kinds, arranged inside one another or stuck together. Sheet units of this kind occur for example as sections of books or signatures in the bookbinding trade.
  • this object is achieved by virtue of the fact that parting is carried out by conventional parting elements which engage the externally disposed (outer) pages, and that during the parting of these pages, the internal (inner) pages, not engaged by the parting elements, are subjected to a bending stress which causes them to part as well.
  • a further feature of the process resides in the fact that during the parting of the externally disposed pages, there is inserted between the pages not affected by the parting elements, a separator element which produces the bending stress, said separator element being withdrawn again before the sheet unit leaves the partingdevice.
  • the device for implementing the process of the invention is characterized in that in front of the cylinders, there is arranged a ridge-shaped separator element which, intermittently and as a function of the cylinder speed, can be swung parallel to the cylinder axes into the lower zone of the gap formed between them.
  • a further feature resides in the fact that the separator element is arranged upon a rocking lever which is spring-loaded, said lever being controlled by a cam which produces an intermittent movement in it.
  • the invention is characterized, furthermore, by the fact that the rocking lever and the cam are arranged in a. housing longitudinally displaceable upon the cam shaft and designed to be set to two terminal positions. It is an essential factor in this context that on one transverse side of the housing a tension spring is arranged and on the other transverse side is disposed the armature of a solenoid which is actuated by the control equipment of the machine.
  • the parting of the internal pages, not engaged by the gripper elements is achieved in that during the parting of the externally disposed pages, a separator element is intermittently inserted between the other pages at the particular point at which parting is desired, said element being operated as a function of the speed of rotation of the cylinders so that after the engagement of the leading edges of the externally disposed pages by the gripper elements, it is introduced at the desired position into the unparted pages and induces in these a bending stress which causes them to part.
  • the separator element Before the sheet unit leaves the cylinders of the parting device, the separator element is withdrawn from the sheet unit so that the latter, with its internal pages spread in the desired way, is deposited upon the conveyor chain and is moved to the next processing stage in the properly parted condition.
  • the separator element engages in the lower zone of the gap formed between the two cylinders, and in the case of cross-folded sheets produces central parting because it enters between the internally situated pages and forces them apart over their full length while where sheet units made up of several sheets are concerned, asymmetrical parting between one or other of the external pages seized by a parting cylinder, and the internal pages, is produced.
  • the separator element is arranged to be transversely displaceable within the nip or gap of the cylinders, and in one terminal position it produces parting between one external page and the other pages, while in the other terminal position it produces parting between the other external page and the other pages.
  • cross-folded sheets are concerned, in all instances central parting takes place since, due to the cross-folding, the parting element is inevitably in all cases introduced between the internal pages. If the cross-folded sheet comprises a priority of pages, then the separator elements in accordance with the invention must be employed to achieve proper parting of the internal, central pages.
  • FIG. I is an illustration, in perspective, of a cross-folded sheet
  • FIG. 2 is a section through a sheet unit constituted by two superimposed folded sheets which have been stuck together;
  • FIG. 3 is a section through a sheet unit consisting of two sheets which have been placed one inside the other and stuck together at the crease or folded edge;
  • FIG. 4 is a schematic illustration of the known parting device, in the context of a sheet in accordance with FIG. I;
  • FIG. 5 is a schematic illustration of the subject of FIG. 4, with the separator element in accordance with the invention, the view being a side elevation;
  • FIGS. 6 to 9 illustrate various operational positions of the parting element, the separator element and the sheet of FIG.
  • FIG. 10 is an illustration of the subject of FIG. 6, when parting a sheet unit in accordance with FIGS. 2 and 3;
  • FIG. 11 is an illustration of the subject of FIG. 10 showing a different manner of parting sheet units in accordance with FIGS. 2 and 3;
  • FIG. 12 is a schematic plan view of the separator element in accordance with the invention.
  • FIGS. 1 to 3 illustrate, the parting device in accordance with the invention is being applied to a cross-folded multipage sheet in accordance with FIG. I which has folded leading edges 1, 2 and has externally disposed pages 3, 4 plus the central, internally disposed pages 5, 6.
  • FIG. 2 illustrates a sheet unit consisting of two sheets 16, 19 and 17, 18 which have been placed one upon the other and stuck together parallel to the fold edge.
  • FIG. 3 likewise illustrates a sheet unit consisting of two sheets l6, l9 and 17, 18, which have been placed one inside the other and stuck together at the fold.
  • FIGS. 4 to 9 illustrate the device in accordance with the invention when parting a cross-folded sheet a. As FIG. 4 shows,
  • FIG. 5 illustrates, a ridge-shaped separator element I0 is disposed in front of the pair of cylinders 7, this element being attached to a lever 11 which pivots about the axis I3.
  • the lever 11 is subjected to the effect of the tension spring 12 and has one arm 14 in contact with a cam 15.
  • FIGS. 5 and 7 also illustrate, the cam contains a recess; when the arm 14 is located in this recess (FIG. 5), the separator element is withdrawn from the gap between the cylinders, while in passing over the circular dwell portion of the cam, it is swung into the gap, as FIG. 7 indicates.
  • the parting cylinders 7 and the cam 15 must, of course, run at the same speed and the cam 15 is so adjusted that with the sheet a in the position shown in FIG. 6 the separator element is pivoted into the gap between the cylinders and, with release of the sheet a by the cylinders 7, is retracted as shown in FIGS. 8 and 9.
  • FIGS. 10 and 11 illustrate the device in accordance with the invention when handling a sheet unit of the kind shown in FIGS. 2 and 3.
  • the parting takes place between on the one hand the sheet 16 and on the other the sheets 17 to 19, while in accordance with FIG. II the parting takes place between on the one hand the sheets 16, 18, I9 and on the other the sheet 17.
  • the parting element I0 with its operating lever II and the cam 15, are arranged in a housing 20 which is mounted so as to be longitudinally displaceable upon the cam shaft 21 carrying the cam 15.
  • the housing can be set in two end positions.
  • a tension spring 22 is attached to one sidewall of the housing 20 while at the opposite sidewall, there engages the armature of a solenoid 23.
  • the solenoid 23 can be energized and deenergized by the control system (not shown) of the machine, and when in the energized condition the separator element 10 is in the lateral position shown in full-time while with the solenoid deenergized, it adopts the position shown in the chain-dotted line.
  • a device for spreading a sheet unit having a pair of external pages and at least one internal page sandwiched between said external pages comprising:
  • spreading means including a pair of cylinders rotatable in opposite senses and provided with respective gripping means engageable with said external pages of a sheet unit for spreading them apart while advancing said sheet unit between said cylinders generally downwardly;
  • drive means for pivoting said separator element intermittently and as a function of the cylinder speed.
  • said drive means comprises a spring-loaded rocking lever carrying said separator element, and a cam rotatable as a function of cylinder speed for intermittently displacing said rocking lever.
  • said drive means further comprises a housing receiving said cam and said rocking lever, a cam shaft extending generally transversely to said axes and driving said cam while shiftably carrying said housing, and mechanism for positioning said housing in two lateral terminal positions along said shaft.
  • said mechanism includes a tension spring fixed to one transverse side of said housing and tending to draw said housing in one direction along said shaft and into one of said terminal positions, and a solenoid having an armature engaging an opposite side of said housing and energizable to draw said housing against said spring into the other of said terminal positions in an opposite direction along said shaft.
  • a method of spreading a sheet unit having a pair of external pages and at least one internal page sandwiched between said external pages comprising the steps of:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
US783593A 1968-04-19 1968-12-13 Devices for separating folded sheets of paper and the like Expired - Lifetime US3572683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1761209 1968-04-19

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CH (1) CH485580A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403770A (en) * 1982-03-22 1983-09-13 Leonard Ferguson Apparatus for collating signatures
US4605212A (en) * 1984-07-26 1986-08-12 M.A.N. Roland Druckmaschinen Aktiengesellschaft Device on a folding gripper cylinder to accept folded products
US4666139A (en) * 1985-10-21 1987-05-19 Harris Graphics Corporation Vacuum system for combination fold-off control
US5409205A (en) * 1993-10-01 1995-04-25 Synchromotion, Inc. Apparatus and method of feeding paper from the bottom of a stack using a reciprocating separator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4434178A1 (de) * 1994-09-24 1996-03-28 Kolbus Gmbh & Co Kg Verfahren zum Auflegen von Druckbogen auf den Heftsattel einer Buchfadenheftmaschine und Vorrichtung zur Durchführung des Verfahrens

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1829833A (en) * 1929-08-05 1931-11-03 Dexter Folder Co Signature handling machine
US1845412A (en) * 1923-07-16 1932-02-16 Edward A Hathaway Stuffing machine
US2390901A (en) * 1944-03-13 1945-12-11 Smyth Mfg Co Book signature feeding method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1845412A (en) * 1923-07-16 1932-02-16 Edward A Hathaway Stuffing machine
US1829833A (en) * 1929-08-05 1931-11-03 Dexter Folder Co Signature handling machine
US2390901A (en) * 1944-03-13 1945-12-11 Smyth Mfg Co Book signature feeding method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403770A (en) * 1982-03-22 1983-09-13 Leonard Ferguson Apparatus for collating signatures
US4605212A (en) * 1984-07-26 1986-08-12 M.A.N. Roland Druckmaschinen Aktiengesellschaft Device on a folding gripper cylinder to accept folded products
US4666139A (en) * 1985-10-21 1987-05-19 Harris Graphics Corporation Vacuum system for combination fold-off control
US5409205A (en) * 1993-10-01 1995-04-25 Synchromotion, Inc. Apparatus and method of feeding paper from the bottom of a stack using a reciprocating separator

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Publication number Publication date
CH485580A (de) 1970-02-15

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