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Publication numberUS3540340 A
Publication typeGrant
Publication dateNov 17, 1970
Filing dateMar 13, 1968
Priority dateMar 13, 1968
Publication numberUS 3540340 A, US 3540340A, US-A-3540340, US3540340 A, US3540340A
InventorsKoskela Veli Sauli
Original AssigneeValmet Oy
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Longitudinal sheet cutter
US 3540340 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

United States Patent inventor Appl. No.

Filed Patented Assignee LONGITUDINAL SHEET CUTTER [56] References Cited UNITED STATES PATENTS Re. 20,492 8/1937 Yoder Primary Examiner.lames M. Meister Attorney-Richards & Geier 6/1956 Senn Lulie et al..

Patterson McCorkindale 83/499 82/34X 83/499X 83/498X 1 Claim, 3 Drawing Figs.

US. Cl 83/499,

83/522, 83/560 ABSTRACT: The upper and lower blade slides of a longitu- Int. Cl 826d l/24, dinal sheet cutter are mechanically coupled with each other, B23d 19/06 so that the displacement mechanism for adjusting the blades Field oiSearch 82/34.l:83/498, to th desired cutting width operates only upon one of the 499, 560, 522 slides, while the other slide follows automatically.

LONGITUDINAL SHEET CUTTER The present invention concerns a longitudinal sheet cutter, having lower and upper blade slides and their displacement mechanism for the adjustment of the blades to give desired cutting widths.

Adjustment of the blades in a longitudinal sheet cutter is nowadays usually carried out in that the rotary upper and lower blades required for each point of cut are adjusted to their proper position by hand. This may be accomplished 3.3., in that at first the lower blades are individually correctly positioned in accordance with the desired cutting widths by displacing the lower blade slides along their guides by hand. After the lower blades have been correctly positioned, the upper blade corresponding to each lower blade is appropriately positioned with reference to the lower blade. Displacement of the upper blades, too, is usually accomplished by displacing the upper blade slides by hand along their guides.

The procedure of blade adjustment outlined above is rather slow and it causes the capacity of the sheet cutter to be considerably reduced if frequent changes of the cutting widths are necessary. This situation is encountered when different fairly small orders are run on one paper machine. In order to make the blade adjustment less time consuming, attempts have been made to automatize the displacement of the blades. In the most extensively automatized blade adjusting method in present use, the displacement of blades has been arranged so that there is an individual actuating motor for each lower and upper blade slide, which under digital control adjusts each lower and upper blade to its correct position.

This previously known method has the drawback that two digital control units are required for each pair of lower and upper blades, which implies high costs.

The objectof the present invention is to eliminate these drawbacks. Accordingly, the invention is characterized in that the upper blade slides have been mechanically coupled to the respective lower blade slides so that control is required only for one of the two blade slides, while the other slide moves into its proper position by virtue of mechanical coupling. Since in a longitudinal sheet cutter according to the invention the upper blade slides are mechanically coupled with the respective lower blade slides, only one digital control unit is required for each pair of blade slides, as a result, the device controlling the blade slides will be less complex, less expensive and more reliable in operation than before. An advantage is also derived from the fact that one actuating motor is suffrcient. For the purpose of coupling the upper blade slides mechanically to the respective lower blade slides, the lead screws moving the upper and lower blade slides along their guides have been coupled to a shaft driven by the motor in such manner that conformity of the rotations of said lead screws is ensured. The said lead screws may obtain their drive from a shaft driven by the motor by means of worm gear transmissions placed on this shaft. Of the pairs of blade slides preferably only the lower blade slide is connected to a digital control unit. a

In the following specification the invention is described in greater detail in terms of one possible embodiment, with reference to the attached drawings.

In the drawings:

FIG. I shows the principle design of the blade adjustment system of a longitudinal sheet cutter as viewed from the front; FIG. 2 shows the same, viewed from the right-hand end; and FIG. 3 shows the same, viewed from the left and in section along the line H of FIG. 1.

In FIG. I can be seen the bed sections 1, which are connected by the upper blade beam 2 and the lower blade beam 3. On the upper blade beam there is a guide 4 for the upper blade slide 5. Attached to the slide 5 are the upper blade holder 6 and the upper blade 7 mounted in the latter. The upper blade slide 5 is moved along its guide 4 by the lead screw 8, with which the slide is engaged for the duration of displacement and from which it is disengaged after the slide has arrived in it proper position, this engagement and disengagement taking place by means of the engaging device 9. The locking of the slide to the guide in desired position is accomplished with the aid of the locking device 24. The lower blade slide 10, too, moves along its own guide 11, actuated by the lead screw 12, with which the slide 10 may be'engaged for the duration of displacement and from which it can be disengaged after the slide has reached its proper position, such engaging and disengaging being accomplished with the aid of the engaging device 13. The slide is locked to the guide by means of the locking device 26. Attached to the slide 10 are the lower blade driving motor 14 and the lower blade 15 proper.

The lower blade beam 3 carries a tooth rack 16 in engagement with which there rotates, when the slide is being moved, the gear wheel 18 of the pulse transmitter 17, which is mounted on the slide.

The driving unit consists of an electromotor 19, which over a coupling 20 drives the vertical shaft 22. This shaft carries the worm gear transmissions 21 and 23, transmission 21 being connected to the lead screw 8 moving the upper blade slides and transmission 23 being connected to the lead screw 12 moving the lower blade slides, in order to actuate said lead screws in such manner that they rotate at identical speeds. As a result of this arrangement, one digital control unit suffices for each pair of blade slides.

On the blade slides limit switches 27 have been provided,

which serve the purpose of stopping the motor 19 and, obviously, at the same time stopping the lead screws in case the lower blade slides arrive at the end of their guide or if they collide. In this manner there can be no damage even if it should occur that improper blade setting data are supplied to the control unit or their control is otherwise improper.

Adjustment of the blades in the device may be accomplished, for instance, as follows. The initial situation is that both pairs of blades have been run to be at one end of the guides. In some suitable manner (e.g., by punch card) information concerning the desired position of both pairs of blades is supplied to the electrical control unit (not shown). The starting switch is then actuated, and the motor 19 starts, at which time both pairs of blades start under action of the lead screws, because the engaging devices 9 and 13 are engaged, and the slide locking devices 24 and 26 are, correspondingly, unlocked. When the pulse counter 17 notes that the lower blade which trails behind the other has arrived at the desired position, thecontrol unit stops the motor 19, operates the locking devices of the trailing lower and upper blade slides and disengages their engaging devices 9 and 13, by which the slides in question are freed from the lead screws. The control unit then starts the motor 19 once more, and the leading pair of blades recommences its travel under action of the lead screws.

When the pulse counter notes that this lower blade has reached the prescribed position, the control unitstops the motor 19, actuates the locking devices ofthe lower and upper blade slides and disengages their engaging devices 9 and 13, so that these slides too are freed from the lead screws. Both lower blades have thus been directed to assume the desired positions and they have been locked in place. Since the movements of the lower and upper blade slides are mechanically completely coupled with each other, the upper blades corresponding to each lower blade will also have reached their proper positions.

The blade adjustment may also be accomplished in that the blades are not initially run to the end of the guides; instead, the information if supplied to the control unit by what amount and in which direction each pair of blades should be displaced. Then, when the starter is actuated, the blades will be moved accordingly. This procedure consumes less time than that described above.

The invention is not restricted to the embodiment described in the foregoing; it may be modified in various ways without transgressing the protective range of the invention. For instance, it is usual for a longitudinal sheet cutter to have a considerably greater number of pairs of blades than has been shown in the attached drawing.

lclaim:

l. A longitudinal sheet cutter, comprising at least one pair of blade slides which consists of an upper slide and a lower slide, guide carrying said slides, lead screws engaging and ;moving said slides along their guides, worm gear transmissions

Non-Patent Citations
Reference
1 *None
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3651723 *Dec 4, 1969Mar 28, 1972Harris Intertype CorpCorrugated paperboard slitter-scorer
US3685379 *Dec 16, 1969Aug 22, 1972Beloit CorpSlitter blade mounting assembly
US3760675 *Apr 21, 1971Sep 25, 1973Masson Scott LtdWeb slitting apparatus
US3760697 *Sep 20, 1971Sep 25, 1973Peters Masch Fa Gmbh WApparatus for grooving and/or longitudinally cutting a continuous web
US3777608 *Jul 22, 1971Dec 11, 1973Siegener Maschinenbau GmbhShear for metal plate
US3786705 *Aug 31, 1971Jan 22, 1974Ahlstroem AApparatus for slitting moving webs
US3834258 *Dec 4, 1972Sep 10, 1974Bystronic MaschApparatus for the simultaneous machining of a material moving with relative motion with respect to the tools, in particular for cutting up a plate of glass
US3882764 *Apr 6, 1973May 13, 1975Simon Ltd HenryCase making machinery
US3886833 *May 1, 1974Jun 3, 1975Elworthy & Co LtdApparatus to effect remote automatic positioning of web slitter
US3929047 *Oct 12, 1973Dec 30, 1975Coulter ElectronicsLongitudinal cutting and/or grooving machine for material webs in motion, particularly cardboard means
US3961547 *Nov 20, 1974Jun 8, 1976Maurice ShainbergPaper scoring and slitting machine
US4169406 *Nov 30, 1977Oct 2, 1979Escomat Maschinenbau Schmitt & Co.Box-folding machine and method of setting up same
US4252044 *Feb 15, 1979Feb 24, 1981Sumikura Industrial Company, LimitedAutomatic cutter positioning device for a gang slitter
US4323098 *Nov 1, 1979Apr 6, 1982Yukitomo SuzukiMethod for controlling position of a plurality of machining shafts each including a machine tool fitted thereto
US4484501 *Sep 14, 1982Nov 27, 1984E.C.H. Will (Gmbh & Co.)Apparatus for cutting and trimming paper sheets or the like
US4548105 *Feb 16, 1984Oct 22, 1985Oy Wartsila AbMethod and arrangement for observing a position
US4607552 *Aug 8, 1985Aug 26, 1986Beloit CorporationApparatus for automatically controlling the position of a plurality of slitters
US4627214 *Sep 23, 1985Dec 9, 1986Marquip, Inc.Slitting-scoring machine
US4708009 *May 29, 1986Nov 24, 1987Alpha Maschinenbau Ag.Bending device for the production of formed parts consisting of wire or strip sections
US4989486 *Sep 5, 1989Feb 5, 1991Tidland CorporationSystem for automatically positioning multiple tool-holding carriages
US4996898 *Dec 1, 1989Mar 5, 1991Tidland CorporationSystem for automatically positioning multiple tool-holding carriages
US5125300 *Dec 1, 1989Jun 30, 1992Tidland CorporationSystem for automatically positioning multiple tool-holding carriages
US5125301 *Jun 3, 1988Jun 30, 1992Tidland CorporationSystem for automatically positioning multiple tool-holding carriages
US5216913 *Jul 2, 1991Jun 8, 1993Alpha-Maschinenbau AgBending machine for skein-shaped material
US5628864 *Oct 30, 1992May 13, 1997Juki CorporationCutting unit in automatic enclosing and sealing apparatus
US6009784 *Jun 26, 1997Jan 4, 2000Bielomatik Leuze Gmbh & Co.Device and method for processing ply material
US6393956 *Mar 16, 1998May 28, 2002Interholtz Technik GmbhDevice for cutting any width of wood or other materials
US6598506 *Jul 31, 2001Jul 29, 2003Gämmerler AGCutting apparatus
US7370562 *Feb 6, 2004May 13, 2008Kabushiki Kaisha IsowaMethod for controlling slitter-scorer apparatus
US7631673 *Feb 12, 2007Dec 15, 2009Raute OyjVeneer cutter
US7980174 *Apr 15, 2008Jul 19, 2011Koenig & Bauer AktiengesellschaftPage of a printed product having a plurality of information fields arranged in different print columns, and longitudinal perforation device for producing the page
US8037795 *Mar 30, 2005Oct 18, 2011Heidelberger Druckmaschinen AgTrimmer for trimming brochures
US20040159693 *Feb 6, 2004Aug 19, 2004Nokihisa AdachiMethod for controlling slitter-scorer apparatus
US20050217453 *Mar 30, 2005Oct 6, 2005Heidelberger Druckmaschinen AgTrimmer for trimming brochures
US20060162520 *Mar 22, 2006Jul 27, 2006Raimann Holzoptimierung Gmbh & Co. Kg, DeDevice for cutting any width of wood or other materials
US20070199621 *Feb 12, 2007Aug 30, 2007Raute OyjVeneer cutter
US20080258453 *Apr 15, 2008Oct 23, 2008Adrian Helmut Alt-SteinerPage of a printed product having a plurality of information fields arranged in different print columns, and longitudinal perforation device for producing the page
USRE40349Mar 16, 1998Jun 3, 2008Raimann Holzoptimierung Gmbh & Co. KgDevice for cutting any width of wood or other materials
EP0251628A1 *Jun 22, 1987Jan 7, 1988WORKMAN, JohnImprovements relating to metal slitting and stamping
EP0411340A2 *Jul 6, 1990Feb 6, 1991Elio Cavagna S.r.l.Limit switch for the selective positioning of cutting units in an apparatus for the cutting of plastic and/or paper materials
EP0411340A3 *Jul 6, 1990Nov 21, 1991Elio Cavagna S.R.L.Limit switch for the selective positioning of cutting units in an apparatus for the cutting of plastic and/or paper materials
Classifications
U.S. Classification83/499, 83/560, 83/522.22
International ClassificationB26D7/26
Cooperative ClassificationB26D7/2635
European ClassificationB26D7/26C2