US3568903A - Stripping member assembly - Google Patents

Stripping member assembly Download PDF

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Publication number
US3568903A
US3568903A US3568903DA US3568903A US 3568903 A US3568903 A US 3568903A US 3568903D A US3568903D A US 3568903DA US 3568903 A US3568903 A US 3568903A
Authority
US
United States
Prior art keywords
frame
stripping
sleeve
stripping member
lever arm
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
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English (en)
Inventor
Pierre Lang
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.)
Bobst Mex SA
Original Assignee
J Bobst et Fils SA
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
Priority claimed from CH778168A external-priority patent/CH474340A/fr
Application filed by J Bobst et Fils SA filed Critical J Bobst et Fils SA
Application granted granted Critical
Publication of US3568903A publication Critical patent/US3568903A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1818—Means for removing cut-out material or waste by pushing out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D2007/1872—Means for removing cut-out material or waste using breakaway pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D2007/189—Mounting blanking, stripping and break-out tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/30—Breaking or tearing apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/30—Breaking or tearing apparatus
    • Y10T225/329—Plural breakers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2074—Including means to divert one portion of product from another
    • Y10T83/2079—Remaining or re-inserted product portion from base material

Definitions

  • ABSTRACT A device for rapidly releasably connecting a waste stripping pin or re ect e ector to a grid or supporting frame.
  • the stripping pin is connected to or forms a part of a leg which in turn is guided for rectilinear movement within a sleeve.
  • the parts are arranged so that the stripping pin and/or 5 [54] ASSEMBLY its associated pin block and the sleeve sandwich the grid or aims rawmg frame between them with the pin extending from one side of [52] US.
  • the device disclosed herein has particular utility on and in connection with die cuttingand creasing assemblies having stripping stations wherein waste portions of a die-cut sheet of paper, cardboard or other sheet stock are adapted to be removed by stripping pins or blocks which for instance may be connected to a frame arranged for relative movement to the cut sheet stock such that on each closing stroke of the frame and sheet, the pins will contact and punch out the waste stock.
  • a principal object of this invention is to provide a novel and improved means for rapidly releasablyconnecting a stripping pin or block to a grid or frame.
  • Another and more specific object of the invention resides in the provision of a stripping pin assembly adapted to releasably clamp the mounting frame or grid between to two parts of the assembly with the stripping pin extending from one side thereof.
  • a more specific object of the invention relates to a stripping pin assembly wherein a sleeve engageable with one side of a grid and a stripping pin block engageable with the other can be locked in a gridgripping position by (a) a-simple lever arm arrangement or (b) a lever and eccentric between the sleeve and a leg extending from the pin block.
  • FIG. 1 illustrates an arrangement knownin the prior art wherein nails or pins are simply driven in a stripping board which in turn is connected to a stripping frame so that as the machine operator changes form one job run to another, the entire board must be changed to alter the waste removal pattern of the stripper as desired.
  • FIG. 2 illustrates a well-known form of stripping unit wherein stripping pins are bolted in a desired position in the frame or grid in accordance with the desired waste stripping pattern for any job run.
  • FIG. 3 illustrates a preformed grid of the type presently in use with devices of the character shown in FIG. 2 and shows both prior art bolted stripping pins as well as those constructed in accordance with this invention mounted on the grid.
  • FIG. 4 illustrates a variation in the design of the grid with which the novel stripping pin assembly may be used.
  • FIG. 5 illustrates the lever arm linkage embodiment of the instant invention at the time of placement of the stripping pin assembly on the grid but before the assembly is clamped to the grid.
  • FIG. 6 illustrates the stripping pin assembly of FIG. 5 in its clamped and locked position on the grid.
  • FIG. 7 illustrates another embodiment of the invention wherein a lever and eccentric are employed to clamp the frame on the grid between the sleeve and pin block.
  • FIG. 8 illustrates a front view of the lever arm illustrated in FIG. 7.
  • This stripping operation is carried out by taking each successive die-cut sheet from the die cutting press, supporting such sheet on a bed having openings formed therein generally conforming to and underlying the waste" portion of the sheet and then urging a plurality of ejector means which may comprise stripping pins or blocks into engagement with the cutout or waste portions of the sheet to drive suchwaste portions through the openings in the supporting bed.
  • ejector means which may comprise stripping pins or blocks into engagement with the cutout or waste portions of the sheet to drive suchwaste portions through the openings in the supporting bed.
  • the stripping pins Since the waste which must be removed from a die-cut sheet is wholly dependent upoh the design and character of the jobbeing run, the stripping pins must always be capable of being reoriented for each job 'sothat for any job at least one stripping pin or block will overlie each waste portion of the die-cut sheet.
  • nails 1 and 2 are simply driven in a board 3 (see FIG. 1) and the board in turn is bolted to a frame 3a which is arranged to have relative reciprocable movement up and own with respect to the die-cut sheet during each machine ycle lonce each time a sheet is drawn to the stripping station) to effect the stripping operation.
  • a frame or grid 4 has a plurality of elongated preformed slots 5 formed therein (see FIG. 3 also) and this grid carries a plurality of stripping pin elements 5a.
  • the pin element has a pin block 7 providingan eccentric mounting for the pin 6 I and a threaded stud 8 extends upwardly therefrom through the frame 4.
  • the stud 8 has a bolt 9 threadedly mounted thereon to securely mount the pin 6 in a fixed position on the grid.
  • the sheet supporting bed or slab 10 is shown generally as having a sheet 10a carried thereon and as having an opening 11 formed therein and conforming generally to the configuration of the waste portion (defined by 11a) stripped from the sheet.
  • FIG. 4 illustrates a modified arrangement of the slot forming the grid. It will become apparent that the stripping pin assembly of this invention and the prior art arrangement of FIG. 2 as well may each be used in conjunction with either type of grid shown in FIGS. 3 and 4 as well as with a solid drilled board or frame such as a plexiglass sheet as well.
  • FIGS. 5 and 6 there is shown a stripping pin assembly comprising a stripping pin or stud 12, a stripping pin block 13 which is connected to or integral with the stripping pin 12, a
  • neck 14 extending upwardly from thestripping pin block and preferably integral therewith and an upstanding projection or leg 15 integral with the neck 14.
  • the leg 15 has an out-turned shoulder 16 formed at its base end which serves to guide the sleeve 17 for movement along the leg; 15.
  • the sleeve 17 has a lever arm 18 pivotally carried thereon at the axis 19.
  • the leg 15 has a second out-tumed shoulder 20 extending therefrom over the shoulder 16 but at the opposite upper end of the leg and this shoulder 20 carries a'lever arm 21 about a pivot 22.
  • One end of the lever arm 21 is interconnected with the lever arm 18 at a pivot 23.
  • At least one dimension of the combined stripping pin and stripping pin block is small enough to permit the stripping pin and stripping pin block to be inserted into one of the grid slots 5 from the top and that at least one common dimension of both the sleeve 17 and the stripping pin block are greater than the slot width in one rotated position of the stripping pin assembly.
  • the neck 14 has no cross-sectional dimension greater than the width of the slot 5.
  • the lengths of the lever arm 18 in relation to the length of leg 15 is such that when the lever arm 21 is rotated from the position illustrated in FIG. to a position aligning the pivots 19, 23 and 22, the distance between the base of the sleeve 17 and the upper surface of the stripping pin block 13 will tend to be just slightly less than the thickness of the frame or grid 4.
  • the stripping pin and block are inserted into a slot and the entire stripping pin assembly is then rotated so that portions of the stripping pin block and sleeve each traverse and overlap the slot.
  • the lever arm 21 is then rotated through a counterclockwise motion as viewed in FIG. 5 and through this action, the sell sleeve 17 and stripping pin block sandwich the grid or frame 4 between them.
  • the pivots 19, 22, 23 can actually be brought into alignment with one another due to the elastic' strain on the various interconnected parts.
  • the parts are so dimensioned that the lever arm 18 can actually pass through an over-center" position from that wherein the pivots 19, 22, 23 are aligned.
  • the stripping pin assembly is illustrated from the same side with the slotbearing frame 4 being rotated through 90. It will be understood by those skilled in this art that in practice, of course, the grid or frame 4 does not rotate.
  • the stripping pin assembly is itself rotated after the stripping pin and stripping pin block have been inserted into a slot.
  • stripping pin block 13 could be substituted for the stripping pin block 13 and that the stripping member may comprise simply a block itself without any pin.
  • the stripping member it is only necessary that the stripping member be sufficiently small in one dimension to permit its insertion through a slot 5 and sufficiently large in another dimension to permit it (as well as the sleeve 17) to traverse the slot 5 in a rotated position of the stripping pin assembly to permit clamping of the stripping pin assembly on the frame or grid 4.
  • FIG. 7 functions in much the same way to produce the same result.
  • the stripping pin 24 is also shown as being carried on a block 25 to provide for an eccentric pin mounting.
  • the stripping pin assembly of FIG. 7 has an upstanding leg 26 connected to or integral with the neck 27 which in turn is connected to the pin block 25.
  • the leg 26 has upwardly inclined slot 27 formed therein which opens downwardly and which serves to carry the pivot pin 28 of a lever arm 29.
  • the pin 28 is axially displaced from the longitudinal axis of the lever arm 29 to provide an eccentric.
  • the bifurcated end of the lever arm 29 terminates in two circular profile portions 30 which portions have their axis displaced from the axis of pin 28.
  • the circular profile portions 30 are engageable with the lip of sleeve 31 (corresponding to sleeve 17) so that by rotating the lever arm 29 in a counterclockwise direction from position 32 to 32' to as viewed in FIG. 7, the portions of the sleeve 31 and flange 25 traversing the slot 5 will clamp the frame or grid 4 between them and thus positively fix the stripping pin assembly in position.
  • a spring pin 33 is provided which extends outwardly from the leg 26 and is movable within an aperture 33 formed in the sleeve 31.
  • the aperture 33 is, of course, large enough to permit the relative axial movement between the sleeve 31 and leg 26 which will accompany rotation of the lever arm 31.
  • FIG. 3 one may see the disposition of the parts of the stripping pin assembly of FIG. 7 when the assembly is clamped in position on the grid or frame 4.
  • a stripping assembly adapted for mounting on a frame having at least one elongated slot formed therein comprising:
  • said stripping member and sleeve having a least one commonlateral dimension greater than the width of said slot
  • lever arms being pivotally interconnected at a pivot 'disposed intermediate the point of pivotal interconnection of said lever arms with said sleeve and leg;
  • a stripping assembly adapted for mounting on a frame having at least one elongated slot formed therein comprising:
  • said stripping member and sleeve having at least one common lateral dimension greater than the width of said slot;
  • a stripping member assembly releasably mountable on a slotted frame comprising:
  • a stripping member positionable on one side of said frame and having a at least one dimension parallel to the plane of said frame great enough to traverse the width of one of the slots in said frame;
  • a clamping member positionable on the opposite side of said frame from said stripping member and traversing the width of said one of said slots;
  • Leverage means interconnecting said clamping member with said extension element whereby topermit said stripping member and clamping member to be forced tightly against opposed faces of said frame to fixedly mount said stripping member on said frame.
  • a stripping member assembly constructed in accordance with claim 3 wherein said clamping member comprises a sleeve surrounding said extension element to guide said extension element for rectilinear movement within the said sleeve.
  • a stripping member assembly constructed in accordance with claim 3 wherein said leverage means comprises:
  • a stripping member assembly constructed in accordance with claim 5 wherein; the parts are so dimensioned that said clamping member and stripping member clamp frame tightly between them by means including the elasticity of the parts with claim 6 wherein said second lever arm is permitted a limited degree of movement to lock said second lever arm in position with the said pivots nearly aligned.
  • line 44 change "form one" to -from one--; line 62, change "1 FIG; 6" to --FIG. 6--.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)
  • Crushing And Grinding (AREA)
  • Making Paper Articles (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US3568903D 1968-05-20 1969-05-16 Stripping member assembly Expired - Lifetime US3568903A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH778168A CH474340A (fr) 1968-05-20 1968-05-20 Dispositif éjecteur de déchets, notamment d'une pièce de carton découpée
CH572169A CH490943A (fr) 1968-05-20 1969-04-16 Dispositif éjecteur de déchets notamment d'une pièce de carton découpée

Publications (1)

Publication Number Publication Date
US3568903A true US3568903A (en) 1971-03-09

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ID=25698271

Family Applications (1)

Application Number Title Priority Date Filing Date
US3568903D Expired - Lifetime US3568903A (en) 1968-05-20 1969-05-16 Stripping member assembly

Country Status (9)

Country Link
US (1) US3568903A (fr)
JP (1) JPS4924514B1 (fr)
BE (1) BE732794A (fr)
CH (1) CH490943A (fr)
DE (1) DE1923504A1 (fr)
ES (1) ES367810A1 (fr)
FR (1) FR2008954A1 (fr)
GB (1) GB1249694A (fr)
SE (1) SE335275B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5292047A (en) * 1990-04-26 1994-03-08 Bobst Sa Universal movable upper tool for a waste-stripping station situated within a sheet die-cutting machine used for producing packages
US5353978A (en) * 1990-04-12 1994-10-11 Bobst Sa Movable upper tool for a blank separating machine
US6325263B1 (en) * 1994-07-14 2001-12-04 Jean-Bernard De Dompierre Movable tool for separating blanks from a sheet of die-cut blanks
WO2024164059A1 (fr) * 2023-02-06 2024-08-15 Paolo Quercia Appareil de retrait de rebut d'une feuille de matériau prédécoupée

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH617886A5 (fr) * 1977-05-26 1980-06-30 Bobst Fils Sa J
CH681870A5 (fr) * 1989-10-03 1993-06-15 Bobst Sa
FR2679169A1 (fr) * 1991-07-16 1993-01-22 Vautier Jean Claude Outil et cheville de decorticage des dechets pour machine de faconnage de flans en carton.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055275A (en) * 1958-02-22 1962-09-25 Schroter Friedrich Method and device for striking out the waste or use from punched sheet workpieces
US3249272A (en) * 1964-08-13 1966-05-03 Arkay Packaging Corp Method and apparatus for stripping waste from a die cut sheet

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055275A (en) * 1958-02-22 1962-09-25 Schroter Friedrich Method and device for striking out the waste or use from punched sheet workpieces
US3249272A (en) * 1964-08-13 1966-05-03 Arkay Packaging Corp Method and apparatus for stripping waste from a die cut sheet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353978A (en) * 1990-04-12 1994-10-11 Bobst Sa Movable upper tool for a blank separating machine
US5292047A (en) * 1990-04-26 1994-03-08 Bobst Sa Universal movable upper tool for a waste-stripping station situated within a sheet die-cutting machine used for producing packages
US6325263B1 (en) * 1994-07-14 2001-12-04 Jean-Bernard De Dompierre Movable tool for separating blanks from a sheet of die-cut blanks
WO2024164059A1 (fr) * 2023-02-06 2024-08-15 Paolo Quercia Appareil de retrait de rebut d'une feuille de matériau prédécoupée

Also Published As

Publication number Publication date
GB1249694A (en) 1971-10-13
JPS4924514B1 (fr) 1974-06-24
DE1923504A1 (de) 1969-11-27
CH490943A (fr) 1970-05-31
ES367810A1 (es) 1971-04-16
FR2008954A1 (fr) 1970-01-30
BE732794A (fr) 1969-10-16
SE335275B (fr) 1971-05-17

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