US2949297A - Presses for treating material in the form of sheets - Google Patents

Presses for treating material in the form of sheets Download PDF

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Publication number
US2949297A
US2949297A US650361A US65036157A US2949297A US 2949297 A US2949297 A US 2949297A US 650361 A US650361 A US 650361A US 65036157 A US65036157 A US 65036157A US 2949297 A US2949297 A US 2949297A
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US
United States
Prior art keywords
conveyor
chains
gripper
press
tension
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
US650361A
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English (en)
Inventor
Bobst Henri
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
Bobst 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
Application filed by Bobst SA filed Critical Bobst SA
Application granted granted Critical
Publication of US2949297A publication Critical patent/US2949297A/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
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0675—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form specially adapted for piles of sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F1/00—Platen presses, i.e. presses in which printing is effected by at least one essentially-flat pressure-applying member co-operating with a flat type-bed
    • B41F1/26—Details
    • 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
    • B65H29/044—Intermediate conveyors, e.g. transferring devices conveying through a machine
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • 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
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/449—Features of movement or transforming movement of handled material
    • B65H2301/4493—Features of movement or transforming movement of handled material intermittent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/30—Chains
    • B65H2404/34—Gripper bars bridging at least two chains running synchronously and parallely
    • B65H2404/341—Details of driving or return drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/42—Die-cutting

Definitions

  • the present invention relates to presses for treating material in the form of sheets such as, for example, sheets of cardboard or paper, with the object of cutting or shaping the same.
  • means are provided for varying the tension applied to the conveyor chains synchronously with the operations of the press, in such a way that the said tension is less during the phases when the chains are stopped than between said phases.
  • Fig. 1 diagrammatically illustrates a press in which might be embodied features of the invention.
  • Fig. 2 illustrates a detail of the invention.
  • Fig. 1 of the accompanying drawing shows a press wherein sheets are conveyed by means of a pair of endless chains which carry intermediate bars provided with grippers.
  • 1 is the frame of the said press, 2 an upper plate and 3 the lower plate. It will be assumed that the lower plate 3 is lifted and lowered alternately in order to cut out or form the sheets which the endless chains 4 convey by means of spaced gripper bars 5 which are carried between the chains. To this end, the said chains are stopped each time that a sheet is introduced into a gripper bar, while another sheet is simultaneously treated between the two plates.
  • the chains 4 are guided principally by the pairs of chain wheels 6 and 7, and if necessary by other wheels, rollers or appropriate members (not shown).
  • pairs of stops are provided at 8 and 9 against which a mechanism, driven synchronously with the operations of the press, momentarily pushes the gripper bars, either displacing them in their normal direction of conveyance (in the illustrated example, in the direction of the arrow) or in the opposite direction, depending on the type of mechanism envisaged.
  • Patented Aug. 16, 1960 example, by keying the shaft of the pair of wheels 7 in blocks 10 which are movable in slideways, and which are returned by springs 11 in the direction causing the chains to be tensioned.
  • the present invention solves the problem which is posed by providing means for modifying the tensile stress applied to the conveying chains synchronously with the operations of the press, in such a manner that this tension is less during the periods when chains are immobilized than between such periods.
  • Fig. 2 again designates the wheels conveying the chains 4, and the blocks 10 on the wheels shaft 12 are capable of moving back and forth in slideways 13.
  • Elastic members which are not illustrated in the drawings, act in the manner of the springs 11 of Fig. l, tensioning the chains 4 by applying a tr-active force to the wheels 7 in the direction of the arrow 14.
  • This tractive force is suificient to insure regular ten sioning of the chains in the condition of rest, while the operations necessary for the displacement of the gripper bars in order to bear against the stops oblige certain portions of the chains to be detensioned.
  • Auxiliary springs or resilient devices 16 are adapted to exert an additional pressure, in the same direction as the tractive force 14, on the blocks 10 of the shaft 12, through the intermediary of straps or split rings 15 which do not rotate since the chain wheels are freely rotatable on their shaft. This arrangement is identical at both ends of the shaft 12.
  • Each spring 16 is wound about a rod 17 of an eccentric 18 and is held under a certain appropriate tension between s-houlders or washers 2d and 2%, the position of the latter washer being adjustable by action of the nuts 21.
  • the said rod has a head 22 capable of sliding in a radial recess in the strap 15.
  • Fig. 2 shows the spring in the inactive position.
  • the rod 17 is disposed with a certain inclination relatively to the direction in which the-block slides. It will be apparent that any other angle, preferably a smaller angle, is possible, and that it would also be possible to cause the springs 16 to act in the direction of the arrow 14.
  • a press for treating sheet material and having a feeding zone and an operational zone comprising an endless conveyor passing through said zones, wheels supporting said conveyor, gripper means on said conveyor for engaging a sheet at the feeding zone and transporting the sheet to the operational zone, stops positioned adjacent the conveyor to engage the gripper means and properly position the same relative to said zones, resilient means coupled to one of the wheels for displacing the same for placing the conveyor under tension to enable a proper positioning of the gripper means, and control means coupled to the resilient means for selectively controlling the tensioning provided thereby to enable a truing of the positioning of the gripper means, said press further comprising a slideway supporting said one wheel for displacement to tension the conveyor, said resilient means engaging the latter said wheel to displace the same in the slideway; said control means engaging the resilient means and providing a force supplementing the forces provided by the resilient means.
  • a press for treating sheet material and having a feeding zone and an operational zone comprising an endless conveyor passing through said zones, Wheels supporting said conveyor, gripper means on said conveyor for engaging a sheet at the feeding zone and transporting the sheet to the operational zone, stops positioned adjacent the conveyor to engage the gripper means and properly position the same relative to said zones, resilient means coupled to one of the wheels for displacing the same for placing the conveyor under tensio'nto enable a proper positioning of the gripper means, and control means coupled to the resilient means for selectively controlling the tensioning provided thereby to enable a truing of the positioning of the gripper means, said resilient and control means providing forces in sub V 4 stantially the same direction, the force of said control means being controllably variable.
  • a press for treating sheet material and having a feeding zone and an operational zone comprising an endless conveyor passing through said zones, wheels supporting said conveyor, gripper means on said conveyor for engaging a sheet at the feeding zone and transporting the sheet to the operational zone, stops positioned adjacent the conveyor to engage the gripper means and properly position the same relative to said zones, resilient means coupled to one of the wheels for displacing the same for placing the conveyor under tension to enable a proper positioning of the gripper means, and control means coupled to the resilient means for selectively controlling the tensioning provided thereby to enable a truing of the positioning of the gripper means, the resilient and control means being coupled for controlling the operation of the resilient means.
  • a control comprising a resilient device for engaging the wheel to provide at least a portion of the tension on the conveyor, and means coupled to the resilient device for controlling the engagement thereof with the Wheel.
  • a control comprising a coupling device connected with the wheel and defining a bore, a rod extending into the bore in a direction having a major component along said predetermined direction, a first shoulder fixed on the rod and spaced from the coupling device, a second shoulder loose on the rod adjacent the coupling device, a spring on the rod between the shoulders for urging the second shoulder against the coupling device, and an eccentric coupled to the rod for controllably urging the same into the bore for the controlled de-tensioning of the conveyor due to the urging of the second shoulder against the coupling device.
  • a control as claimed in claim 5 comprising a shaft for the wheel; said coupling means being a split ring mounted on the shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Drives For Endless Conveyors (AREA)
  • Discharge By Other Means (AREA)
US650361A 1956-04-16 1957-04-03 Presses for treating material in the form of sheets Expired - Lifetime US2949297A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH329746T 1956-04-16

Publications (1)

Publication Number Publication Date
US2949297A true US2949297A (en) 1960-08-16

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ID=4572970

Family Applications (1)

Application Number Title Priority Date Filing Date
US650361A Expired - Lifetime US2949297A (en) 1956-04-16 1957-04-03 Presses for treating material in the form of sheets

Country Status (4)

Country Link
US (1) US2949297A (en, 2012)
CH (1) CH329746A (en, 2012)
DE (1) DE1039822B (en, 2012)
FR (1) FR1170343A (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062538A (en) * 1960-08-01 1962-11-06 Xerox Corp Sheet feeding apparatus
US3276772A (en) * 1964-01-23 1966-10-04 Champlain Company Inc Apparatus for punching, scoring, and printing cards
US20080308140A1 (en) * 2004-08-17 2008-12-18 The Furukawa Electric Co., Ltd. Thermo-Electric Cooling Device
WO2017153055A1 (fr) * 2016-03-09 2017-09-14 Bobst Mex Sa Tendeur de chaines, machine de traitement d'elements en forme de feuilles et procede pour tendre les trains de chaines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10312321A1 (de) * 2003-03-19 2004-09-30 Claas Selbstfahrende Erntemaschinen Gmbh Spanneinrichtung für einen Zugmitteltrieb

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US492872A (en) * 1893-03-07 Wilhelm maybach
US733385A (en) * 1901-12-04 1903-07-14 American Tin Plate Company Machine for piling metal sheets.
US2254592A (en) * 1938-03-19 1941-09-02 Laurence J Berkeley Belt clutch
US2512084A (en) * 1945-04-24 1950-06-20 Bobst Henri Centering device for gripper bars in sheet handling machines
US2664757A (en) * 1950-07-27 1954-01-05 Shaw Louis Eaton Automatic belt tension take-up

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE849938C (de) * 1949-01-25 1952-09-18 Hermann Truempy Selbsttaetiger Spannungsregler fuer den Kettenantrieb der Steuerwellen von Verbrennungskraftmaschinen
US2784607A (en) * 1951-04-18 1957-03-12 Kewance Machinery & Conveyor C Combination belt drive interrupting mechanism with belt gripping means

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US492872A (en) * 1893-03-07 Wilhelm maybach
US733385A (en) * 1901-12-04 1903-07-14 American Tin Plate Company Machine for piling metal sheets.
US2254592A (en) * 1938-03-19 1941-09-02 Laurence J Berkeley Belt clutch
US2512084A (en) * 1945-04-24 1950-06-20 Bobst Henri Centering device for gripper bars in sheet handling machines
US2664757A (en) * 1950-07-27 1954-01-05 Shaw Louis Eaton Automatic belt tension take-up

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062538A (en) * 1960-08-01 1962-11-06 Xerox Corp Sheet feeding apparatus
US3276772A (en) * 1964-01-23 1966-10-04 Champlain Company Inc Apparatus for punching, scoring, and printing cards
US20080308140A1 (en) * 2004-08-17 2008-12-18 The Furukawa Electric Co., Ltd. Thermo-Electric Cooling Device
WO2017153055A1 (fr) * 2016-03-09 2017-09-14 Bobst Mex Sa Tendeur de chaines, machine de traitement d'elements en forme de feuilles et procede pour tendre les trains de chaines
CN109071141A (zh) * 2016-03-09 2018-12-21 鲍勃斯脱梅克斯股份有限公司 链条张紧器，板材式元件加工机和用于张紧链条组的方法
RU2685898C1 (ru) * 2016-03-09 2019-04-23 Бобст Мекс Са Натяжитель цепи, машина для обработки элементов в виде листов и способ натяжения цепей
AU2017229039B2 (en) * 2016-03-09 2019-11-28 Bobst Mex Sa Chain tensioner, machine for processing sheet-form elements, and method for tensioning the sets of chains
CN109071141B (zh) * 2016-03-09 2020-01-31 鲍勃斯脱梅克斯股份有限公司 链条张紧器，板材式元件加工机和用于张紧链条组的方法
US10753434B2 (en) 2016-03-09 2020-08-25 Bobst Mex Sa Chain tensioner, machine for processing elements in the form of sheets and method for tensioning the chain sets

Also Published As

Publication number Publication date
CH329746A (fr) 1958-05-15
FR1170343A (fr) 1959-01-13
DE1039822C2 (en, 2012) 1959-03-05
DE1039822B (de) 1958-09-25

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