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Publication numberUS3391926 A
Publication typeGrant
Publication dateJul 9, 1968
Filing dateApr 27, 1966
Priority dateApr 27, 1966
Publication numberUS 3391926 A, US 3391926A, US-A-3391926, US3391926 A, US3391926A
InventorsArno Jaatinen Per
Original AssigneeArno Jaatinen Per
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Device for removing sheets or plates from a pile one by one
US 3391926 A
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Description  (OCR text may contain errors)

July 9, 1968 P. A. JAATINEN DEVICE FOR REMOVING SHEETS OR PLATES FROM A FILE ONE BY ONE Filed April 27, 1966 :illlllllllll M United States Patent 3,391 926 DEVICE FOR REMOVING SHEETS OR PLATES FROM A PILE ONE BY ONE Per Arno Jaatinen, Koivikkotie 12, Helsinki 63, Finland Filed Apr. 27, 1966, Ser. No. 545,620 1 8 Claims. (Cl. 27127) ABSTRACT OF THE DISCLOSURE The sheet separator comprises a suction box having powered rollers protruding from the bottom, open face of the box. Vacuum is applied to the box between the rollers and packing means extend from each roller to the box so as to confine the suction between the rollers.

This invention refers to a device for removing sheets or plates from a pile one by one. The device includes a suction box, arranged by means of vacuum to catch the uppermost sheet or plate.

Such a device is used when sheets, as paper, cardboard, carton or similar sheets or plates, as veneer, plywood, metal, chip, wallboard, plastic or other similar plates are fed into a working machine, for example into a printing, grinding or punching machine.

Feeding devices, operating by means of friction wheel, are known. They, however, tend to feed, besides the uppermost sheet, also underlying sheets, which causes disorder in the work process.

The use of hooks which fasten on the back edge of the uppermost sheet in the pile, is known, too. The use of this expedient is only suited for rather thick plates and may damage these.

Suction cups are also known, which catch the uppermost sheet, lift the same upward, move sideways together with the sheet, and drop the sheet, for example on a conveying table, which brings the sheet into the working machine. Thereafter the suction cup or suction cups move horizontally back to the original position and catch a new sheet. Devices, operating by means of suction cups, are very slow, because of both vertical and horizontal movements. When the sheet is moved horizontally, this causes a torsional strain in the suction cup, on account of which the suction cup gets broken. This risk increases with increasing speed of the operation.

In the device according to the present invention, suction, caused by a vacuum, is also made use of, but in a different way, so that the above-described disadvantages inherent in the use of the suction cup do not appear. The invention is characterized in that a suction box is provided with one or more rotatable wheels against which the sheet or plate presses and which moves the sheet or plate sideways from the pile.

An embodiment of the invention is illustrated in the drawing, in which FIG. 1 shows a side view of the device in operation.

FIG. 2 shows the same device in a larger scale, as a section from FIGURE 3 along the line IIII,

FIG. 3 shows a section, taken from the FIG. 2 along the line III--III.

The device according to the invention consists of a suction box 5, comprising a pipe 6 in the upper part of the box, to which pipe an elastic suction pipe 8 is fastened by means of a clamping band 7. Two rubber wheels 9, the lower parts of which extend beneath the lower edge of the suction box, are fastened with bearings to the suction box. The wheels are operated by chains 10 and 11 driven by motor 12, placed on the suction box 5. The wheels 9 are packed in relation to the suction box with packings 21, 22, dragging along the surface of the wheels, so that the suction effect takes place through the space between the Wheels.

The device according to FIGURES 1-3 operates in the following way. When the suction box 5 is subjected to the influence of suction and situated at a distance from the pile of plates 2, it sucks the uppermost plate 23 against its lower surface. The rotating wheels 9 move the plate in the direction of the arrow 13 onto the feeding wheels 13 and 25 of the working machine (not illustrated) as shown in the FIGURE 1. Thereafter the valve, (not illustrated), situated between the suction apparatus 1 and suction box 5, is closed, whereupon the suction box returns to normal pressure. When plate 23 has been completely transported to feeding table 24, the suction box 5 is again subjected to suction, whereupon the suction box catches the next plate and moves it to the feeding table 24. The table 3, on which the pile 2 of plates is situated, is continuously lifted up while the plates are fed away from the pile so that the uppermost plate is always situated approximately at the same level as the feeding table 24.

In case the plates in the pile 2 are so heavy that the suction box 5 is not able to suck them against its lower side, the suction box is lowered to the uppermost plate by means of a pressure cylinder 4, the piston rod 14 of which is fastened to the suction box. When the suction box 5 is now subjected to suction, it sucks the uppermost plate towards the suction box and partly reduces the weight of this plate. The friction between the uppermost plate and the underlying plate is reduced so much that the wheels 9 are able to move the uppermost plate onto the feeding table 24. For this purpose the surface of the wheels 9 is made of rubber or other material with high friction. The invention is, of course, not confined to the embodiment illustrated by the drawing. For example, there can be only one wheel 9 or there can be more than two wheels.

subjecting the suction box 5 alternately to suction and providing it with a normal pressure, and the gradual lifting of the table 3 can be arranged to take place automatically, in accordance with a desired program.

I claim:

1. A device for transporting a single sheet from a pile of sheets, said device comprising a suction box adapted for being positioned above a pile of sheets, two rotatable wheels supported within the suction box in spaced relation and extending in part below the suction box, said rotatable wheels having an external surface of relatively high frictional coefiicient, packing means in said box in contact with the wheels and the box to define therewith an enclosed space which is open between said wheels, means for creating a vacuum in said space to cause the uppermost sheet in said pile to be lifted from the pile and held against the rotatable wheels and means for rotating the wheels to displace the sheet held by the wheels laterally away from the pile.

2. A device as claimed in claim 1 wherein the suction box has an inner surface and the packing means includes a member for each wheel, said member having opposite ends, one of which is secured to the inner surface of the suction box and the other of which rests on the associated wheel within the suction box.

3. A device as claimed in claim 1 comprising means for releasing the vacuum in the space after the sheet has been laterally displaced away from the pile.

4. A device as claimed in claim 3 wherein said means for creating a vacuum in said space comprises suction producing means and means connecting the suction producing means and the suction box.

5. A device as claimed in claim 4 wherein the means for releasing the vacuum comprises a valve in the means box.

6. A device as claimed in: claim 1 comprising means for raising and lowering the suction box to adjust the level of said suction box relative'to the uppermost sheet onthe pile. 4 I v v 7. A device as claimed in claim 6 wherein the means for raising and lowering the suction box comprises a cylinder adapted for receiving a pressure fluid, .and a piston'slidably mounted in the cylinder and secured to the suction box for displacing the suction box when the cylinder is pressurized, 8. A device as claimed in claim 1 wherein the rotatable wheels are rubber wheels. v v

wkefe uc fited ,v UNITED STATES PATENTS OTHER REFERENc dsQTf IBM Techical Bulletin, pp. 16-17,.v0l. 2, N0. 5, Feb- 10 ruary 1960.

EDWARD A. SROKA;Primary Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2973960 *Jan 14, 1960Mar 7, 1961Bucciconi Eng CoArticle conveyor
GB1020002A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3620527 *Jan 29, 1969Nov 16, 1971Durand Machine Works LtdSheet handling apparatus
US3680855 *Jun 29, 1970Aug 1, 1972Bunn Co BPick-off head for sorting machine
US3727775 *Feb 23, 1971Apr 17, 1973Farah Mfg Co IncPickup and transfer device
US3737034 *Oct 6, 1971Jun 5, 1973Broyhill Furniture IndLumber unstacking apparatus
US3845950 *Aug 25, 1971Nov 5, 1974B KuzniakMaterial handling apparatus
US3848752 *Sep 17, 1970Nov 19, 1974Pilkington Brothers LtdApparatus for transferring sheet material
US3902411 *Jan 26, 1973Sep 2, 1975Addressograph MultigraphForm feed and transport assembly
US3964740 *Jan 13, 1975Jun 22, 1976Lamb Reginald TSheet-feeding apparatus
US3994489 *Sep 19, 1974Nov 30, 1976Henc Edward VRolling vacuum feed table
US4235432 *Jun 30, 1978Nov 25, 1980Marquip, Inc.Sheet feeding
US4443099 *Feb 17, 1982Apr 17, 1984Lucht Engineering CorporationPhotographic printing system
US4451028 *Nov 27, 1981May 29, 1984Xerox CorporationSheet feeding apparatus
US4496143 *Jun 1, 1982Jan 29, 1985Emf CorporationSheet feeder
US4643413 *Mar 7, 1984Feb 17, 1987The Ward Machinery CompanyFeeding apparatus for paperboard sheets
US4776577 *Mar 10, 1987Oct 11, 1988Marquip, Inc.Shingling of delicate conveyed sheet material
US5048812 *Feb 8, 1990Sep 17, 1991Prime TechnologySheet feeding apparatus
US5315348 *Feb 5, 1993May 24, 1994Ray HicksAutomated photographic negative card holder
US5404197 *May 24, 1994Apr 4, 1995Hicks; RayAutomated photographic negative card handler
US5511936 *Apr 7, 1994Apr 30, 1996Licentia Patent-Verwaltungs-GmbhSeparation method and device
US5611658 *Apr 16, 1993Mar 18, 1997Ab VolvoMethod and apparatus for destacking sheet metal members
US5704757 *Sep 30, 1996Jan 6, 1998Fuji Electric Co., Ltd.Food material transfer apparatus
US6315281 *Dec 22, 2000Nov 13, 2001Asahi Seiko Co., Ltd.Apparatus for sending out bill or card type material
DE2926136A1 *Jun 28, 1979Jan 10, 1980Marquip IncBogenzufuehrvorrichtung
EP1533259A1 *Nov 19, 2003May 25, 2005Siempelkamp Handling Systeme GmbH & Co.Unstacking device with a friction roller device
Classifications
U.S. Classification271/112, 414/797, 271/95, 414/797.3
International ClassificationB65H5/06, B65H3/08
Cooperative ClassificationB65H2406/30, B65H5/06, B65H3/08, B65H2406/3122
European ClassificationB65H3/08, B65H5/06