EP0597782A1 - Agrafeuse entraînée par moteur - Google Patents

Agrafeuse entraînée par moteur Download PDF

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Publication number
EP0597782A1
EP0597782A1 EP93420447A EP93420447A EP0597782A1 EP 0597782 A1 EP0597782 A1 EP 0597782A1 EP 93420447 A EP93420447 A EP 93420447A EP 93420447 A EP93420447 A EP 93420447A EP 0597782 A1 EP0597782 A1 EP 0597782A1
Authority
EP
European Patent Office
Prior art keywords
clinchers
clincher
staple
sheets
set forth
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.)
Withdrawn
Application number
EP93420447A
Other languages
German (de)
English (en)
Inventor
Roman M. Golicz
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.)
Roll Systems Inc
Original Assignee
Roll Systems Inc
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 Roll Systems Inc filed Critical Roll Systems Inc
Publication of EP0597782A1 publication Critical patent/EP0597782A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F7/00—Nailing or stapling; Nailed or stapled work
    • B27F7/17—Stapling machines
    • B27F7/19—Stapling machines with provision for bending the ends of the staples on to the work

Definitions

  • This invention relates to a power stapler and more particularly to an improved clinching head for use in a power stapler.
  • Power staplers operated by pneumatic and/or electric actuators are widely used in document handling and document creation applications.
  • Photocopiers and laser printers often incorporate a power stapler or "stitcher” in their mechanism to provide optional binding of completed documents.
  • Fig. 1 is an example of a typical implementation for a stitcher 10.
  • a set of printed sheets 12 are fed either one at a time or as a group (as shown) to the stitcher 14.
  • the stitcher 14 itself, comprises an electromechanical and/or pneumatic stitcher shown schematically.
  • a known stitcher such as the Hohner Universal 52/8 is contemplated.
  • the stitcher 14 forms wire staples or "stitches" 16 as shown from a fed coil 18 of staple wire 20 in a conventional manner.
  • the staple 16 is driven as shown by the arrows 22 by a reciprocating stitcher head 24 into a predetermined point on the stack of sheets 12 such as an upper corner as shown in Fig. 1.
  • this invention has as an object the formation of improved staples by providing an improved clincher head.
  • This invention also has as an object the stitching of variable thickness stacks of pages without requiring adjustment of the staple length.
  • a power stapler provides an improved clincher head for use in conjunction with a stitcher that drives staples through a stack of sheets.
  • the clincher head includes clinchers that abut a stop that limits travel of the clinchers into the clincher head. Accordingly, as the staple is driven through the stack of sheets, its ends are brought into contact with the partially retracted clinchers.
  • the angle at which the clinchers are positioned in their partially retracted, stopped, state is chosen so that the driven staple ends plastically deform inwardly toward themselves as they contact the grooved faces of the clinchers.
  • the grooves within the faces of the clinchers are arranged at angles so that the guided ends of the staples moving therealong miss each other.
  • a stop can be mounted in the clincher head that interacts with a slot in the bar.
  • the slot is sized and arranged to prevent retraction of the bar so that the clinchers rest on the bar in a partially retracted state and both the bar and the clinchers are prevented from full retraction into the head, thus forming the desired angle for forming inwardly directed bends in the staple ends.
  • a stitching implementation according to Fig. 1 can be utilized according to this invention in order to bind sheets in a stack together using staples 16.
  • the stitcher head 24 forms and drives staples 16 through the stack and the clinching head 26 subsequently, by means of a pneumatic actuator 30, bends the ends of the staple 16 passing through the stack 12 to bind the staple 16 to the stack 12.
  • the stitcher 14 in this example is located above the clincher head 26 in this implementation, it can be preferred in some embodiments to locate the clincher head 26 above the stack 12.
  • “above” and “below” will refer to orientation of components relative to the clincher head surface 54 and not to the orientation of components relative to the ground.
  • Fig. 2 and Figs. 3A-C further detail a prior art clincher head.
  • the head 26 comprises a block 32 that can include two core pieces 34 along the sides of the head 26 and outer plates 36 bolted to the core pieces to form a hollow interior channel 38.
  • the lower portion of the channel 38 is substantially rectangular and allows a clincher bar 40 constructed, generally, of hardened steel to slide therein.
  • the bar 40 can move along the channel 38 as shown by the double arrow 41.
  • the bar 40 is connected to a pneumatic actuator 30 that advances and retracts the bar 40 upon application of pressure.
  • the stitcher according to this invention includes timing circuitry (not shown) that controls the timing of staple formation, staple driving and clinching respectively. Clinching, in general, is the final step in the process.
  • a valve 42 on the actuator air line 44 that is connected to the timing control circuitry governs the application of air pressure to the actuator 30.
  • the bar 40 acts to move a pair of clinchers 46 located at the uppermost end of the clincher head 32.
  • the clinchers 46 are seated between the outer plates 36 on pivots 48.
  • the clinchers 46 have flattened upper surfaces 50 that, according to this embodiment, include grooves 52 for guiding a staple wire therealong.
  • the clinchers 46 rotate on the pivots 48 between a fully retracted position in which the clincher upper surfaces 50 define an angle A with the flat upper surface 54 of the clincher head 32, and a fully extended position in which the upper surfaces 50 pass out of the clincher head (as shown in phantom).
  • the clinchers 46 according to this embodiment can be pivoted upwardly out of the head surface for removal by aligning the rear slots 56 of the clinchers 46 with the thinner cross section of their rectangular pivot 48.
  • removability of the clinchers 46 is not necessary according to this invention.
  • the bar 40 In a fully retracted state (shown by solid lines), the bar 40 is substantially out of contact with the clinchers 46 so as to allow them to retract fully into the clincher head 32, hence defining the angle A.
  • the bar 40 can be extended upon actuation as shown by the extended bar (in phantom) to force the clinchers 46 beyond the upper surface 54 of the head 32.
  • the opposing stitcher head 24, as shown in Fig. 1 limits the outward extension of the clinchers 46. This is further illustrated in Figs. 3A-C which will now be described.
  • the staple 16 is driven (arrow 60) through the sheet stack 12 by the stitcher head 24 until the staple ends 62 pass out of the opposing side of the stack and into contact with the upper surfaces 50 of the clinchers 46. Since the clinchers 46 are retracted and the clincher bar 40 is not extended into contact with the clinchers 46, the staple ends 62 remain relatively straight at this time.
  • Fig. 3B illustrates the step following driving of the staple 16 by the stitcher head 24.
  • the bar 40 is then extended upwardly (arrow 63) so as to rotate the clinchers 46 toward the staple ends as shown by the arrows 64. Accordingly, the staple ends 62 rotate about the bottom face 66 of the stack 12 until the ends are brought into parallel alignment with the bottom face 66 of the stack 12.
  • the stack 12 has been firmly bound by the staple 16 as shown in Fig. 3C and is ready for output from the stitcher mechanism.
  • the extreme retraction of the clinchers 46 as shown in Figs. 2 and 3A-C causes the ends 62 of the staple to bend into virtually parallel alignment with the stack bottom face 66 (see Fig. 3C).
  • the bent ends 62 of the staple 16 are, thus, somewhat unlike those formed by the manual staplers in which the tips 68 of the bent ends 62 are driven back into the lower face of the stack and often dig into the face.
  • the parallel ends 62 generated by a power stitcher can catch on clothing, often include burrs that abrade skin causing cuts and are more prone to become unbent and allow the stack to unbind.
  • Fig. 4 illustrates an improvement to the clincher head 26 of Fig. 2 in which a clincher head 70 is provided that limits retraction of the clinchers 46.
  • the angle Al defined between the upper surfaces 50 of the retracted clinchers 46 and the surface 54 of the clincher head 70 is reduced from the angle A of Fig. 2.
  • Such a reduction is facilitated according to this embodiment by forming a channel 72 in the clincher bar 74 and inserting through-passing bolt or stake 76 in which the channel 72 rides.
  • the stake 76 is held by the outer head plates 78 which include holes for retaining the stake 76.
  • the length channel 72 is chosen so that the lower end 80 of the channel 72 still allows maximum extension of the bar 74 (as shown in phantom), but the upper end 82 of the channel 72 limits retraction of the bar 74. Retraction of the bar 74 is limited so that the clinchers 46 remain in contact with the upper end 84 of the bar 74 and define therewith an angle Al.
  • each clincher 46 can have associated therewith its own stake or bolt that limits retraction.
  • the clinchers can also be formed so that lower ends 86 thereof contact the central blocks 34 of the clincher 46 upon a certain predetermined degree of retraction.
  • the blocks 34 would have to be lengthened or the lower ends 86 of the clinchers 46 would have to be extended to limit retraction to the appropriate angle Al.
  • the angle Al is chosen, according to this embodiment, based upon usually trial and error so that an optimum shape for the staple end 62 is generated.
  • the angle Al causes formation of staples with ends 62 as illustrated in Figs. 5A-D which will be described further below.
  • the ends of the staple are spaced from each other when the staple is clinched as shown by the space 75 in Fig. 3C. Otherwise, the ends of the staple, which are normally collinear (i.e. both along the same line which in this example is perpendicular to the axes of the clincher pivots 48), tend to strike each other causing a defective stitch.
  • the clinchers 46 include grooves 52a that are angled relative to each other as illustrated in Fig. 4A.
  • Each groove 52a is offset by an acute angle B to grooves define noncollinear lines that are parallel to each other.
  • staple ends riding within the grooves 52a tend to pass each other even if they are long enough to meet.
  • Fig. 4B illustrates a stack 87 that would be considered too thin for the length of staple 89 chosen. Accordingly, in a conventional clincher embodiment in which grooves are aligned along a single common line (i.e. "collinear"), the staple ends 91 would collide. Conversely, however, by utilizing angled grooves 52a according to this embodiment, the ends 91, upon clinching, pass by each other and do not interfere with each other.
  • Fig. 5A illustrates the driving of a staple 16 through a stack of sheets 12.
  • the stitcher head 24 is still in the process of driving (arrow 60) the staple when the ends 62 contact the retracted clinchers 46 that are shown resting on the clincher bar 74 in a less retracted state than in Figs. 3A-C.
  • the staple ends 62 begin to bend toward each other (arrows 88) along the slightly downwardly angled slopes of the clincher upper surfaces 50.
  • the tips 68 of the staple end 62 have bent inwardly slightly toward the lower stack face 66.
  • the clinchers 46 have not yet moved upwardly under the force of the bar 74, but are at this time only resting on the bar 74.
  • the reason the tips 68 bend in slightly is that, unlike the example of Fig. 2, the angle Al of the less retracted clinchers 46 of this embodiment are chosen so that the bending of the staple end tips 68 imparts a force on the ends 62 that is greater than the elastic limit of the staple wire.
  • the inwardly bent tips 68 are forced back into the lower stack face 66.
  • the tips thus, form a more traditional curled-in staple end 62 as shown in Fig. 5D.
  • the inwardly directed tips 68 are not as prone to grab on clothing or skin and serve to more firmly bind the stack of sheets together.
  • the clinchers 46 are angled to form as large a curve in the staple end 62 as possible, certain types of staple wire may be more resistant to plastic deformation than others.
  • the angle Al should be at least sufficient to cause the ends 62 of the staples to plasticly deform slightly.
  • the inward curl of the staple 16 need not be pronounced to attain a desired result. Even a slight inwardly projected bend in the staple end 62 will prevent grabbing and enhance grip of the staple 16 on the sheet back 12.
  • the staple 16 can still carry a shape substantially similar to that of more conventional power stitchers except that the tips are now directed toward the stack face and are generally aligned along parallel angled lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
EP93420447A 1992-11-13 1993-11-10 Agrafeuse entraînée par moteur Withdrawn EP0597782A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US97627592A 1992-11-13 1992-11-13
US976275 1992-11-13

Publications (1)

Publication Number Publication Date
EP0597782A1 true EP0597782A1 (fr) 1994-05-18

Family

ID=25523949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93420447A Withdrawn EP0597782A1 (fr) 1992-11-13 1993-11-10 Agrafeuse entraînée par moteur

Country Status (3)

Country Link
EP (1) EP0597782A1 (fr)
JP (1) JPH06315906A (fr)
CA (1) CA2108807A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997031758A1 (fr) * 1996-02-27 1997-09-04 Isaberg Rapid Ab Agrafeuse a mecanisme d'aplatissement
EP1541291A1 (fr) * 2002-07-26 2005-06-15 Max Co., Ltd. Agrafeuse et cartouche
CN100586662C (zh) * 2004-02-05 2010-02-03 伊萨贝格雷玻德股份公司 钉书机
US9592597B2 (en) 2013-01-23 2017-03-14 Worktools, Inc. Flat clinch stapler anvil assembly
US9987734B2 (en) 2013-01-23 2018-06-05 Worktools, Inc. Flat clinch anvil assembly

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1056346B1 (fr) 1998-02-23 2009-08-26 Swift Beef Company Procede et systeme de traitment des dechéts produit par l'epilage des animaux
JP4644973B2 (ja) * 2000-06-01 2011-03-09 マックス株式会社 電動ステープラ
WO2017094040A1 (fr) * 2015-11-30 2017-06-08 内田洋行グローバルリミテッド Dispositif d'agrafage
JP2018024145A (ja) * 2016-08-09 2018-02-15 株式会社トーカイコーポレーション 紙製ステッチの折り曲げ装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2019764A (en) * 1978-05-01 1979-11-07 Xerox Corp Pneumatic stapler
GB2024083A (en) * 1978-06-26 1980-01-09 Xerox Corp Clinching staples
EP0009964A1 (fr) * 1978-10-02 1980-04-16 Xerox Corporation Appareil pour relier un jeu d'articles par agrafage
US4593847A (en) * 1985-05-01 1986-06-10 Interlake, Inc. Bypass clincher for stitching machine
US4792077A (en) * 1987-04-27 1988-12-20 Custom-Bilt Machinery, Inc. Apparatus for stapling and creasing paper articles in transit
EP0322906A2 (fr) * 1987-12-28 1989-07-05 Max Co., Ltd. Agrafeuse électrique
WO1990008015A1 (fr) * 1989-01-23 1990-07-26 Swingline Inc. Enclume de guidage comprenant des ailes de rabattage mobiles pour agrafeuse
DE4020355A1 (de) * 1990-06-27 1992-01-02 Kodak Ag Heftvorrichtung zum zusammenheften von blaettern

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2019764A (en) * 1978-05-01 1979-11-07 Xerox Corp Pneumatic stapler
GB2024083A (en) * 1978-06-26 1980-01-09 Xerox Corp Clinching staples
EP0009964A1 (fr) * 1978-10-02 1980-04-16 Xerox Corporation Appareil pour relier un jeu d'articles par agrafage
US4593847A (en) * 1985-05-01 1986-06-10 Interlake, Inc. Bypass clincher for stitching machine
US4792077A (en) * 1987-04-27 1988-12-20 Custom-Bilt Machinery, Inc. Apparatus for stapling and creasing paper articles in transit
EP0322906A2 (fr) * 1987-12-28 1989-07-05 Max Co., Ltd. Agrafeuse électrique
WO1990008015A1 (fr) * 1989-01-23 1990-07-26 Swingline Inc. Enclume de guidage comprenant des ailes de rabattage mobiles pour agrafeuse
DE4020355A1 (de) * 1990-06-27 1992-01-02 Kodak Ag Heftvorrichtung zum zusammenheften von blaettern

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SPEHRLEY, JR., XEROX DISCLOSURE JOURNAL, vol. 8, no. 3, May 1983 (1983-05-01), pages 187 - 188 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997031758A1 (fr) * 1996-02-27 1997-09-04 Isaberg Rapid Ab Agrafeuse a mecanisme d'aplatissement
GB2325878A (en) * 1996-02-27 1998-12-09 Isaberg Rapid Ab Stapler having a clinching mechanism
GB2325878B (en) * 1996-02-27 1999-04-28 Isaberg Rapid Ab Stapler having a clinching mechanism
CN1061585C (zh) * 1996-02-27 2001-02-07 伊萨贝格雷玻德股份公司 具有一种敲弯机构的钉书机
EP1541291A1 (fr) * 2002-07-26 2005-06-15 Max Co., Ltd. Agrafeuse et cartouche
EP1541291A4 (fr) * 2002-07-26 2005-09-28 Max Co Ltd Agrafeuse et cartouche
CN100586662C (zh) * 2004-02-05 2010-02-03 伊萨贝格雷玻德股份公司 钉书机
US9592597B2 (en) 2013-01-23 2017-03-14 Worktools, Inc. Flat clinch stapler anvil assembly
US9987734B2 (en) 2013-01-23 2018-06-05 Worktools, Inc. Flat clinch anvil assembly

Also Published As

Publication number Publication date
CA2108807A1 (fr) 1994-05-14
JPH06315906A (ja) 1994-11-15

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