DE1235337B - Device and method for separating printed sheets of paper from a discontinuously moving band of overlapped sheets of paper connected by lamination with a thermoplastic material - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

B41f

German KI .: 15 d- 35/03

Number: 1235337

File number: C 33324 VII b / 15 d

Filing date: July 4, 1964

Open date: March 2, 1967

The invention relates to an apparatus and a method for severing printed sheets of paper of a discontinuously moving, by lamination with a thermoplastic material connected band of overlapped sheets of paper. The sheets of paper consist of, for example Images, pages of pamphlets, graphic representations, etc.

So far, the individual sheets have been torn off by hand, which is the disadvantage of a proportionate large expenditure of time and a relatively large amount of wear and tear. The paper tape can be do not cut in the usual way, because this also includes the overlapped part of the sheet, which is in the following Further processing, e.g. B. when folding the separated sheets, is required, cut off would be.

The invention is essentially based on the object of providing a device and a method create, which avoids the aforementioned disadvantages and a mechanical cutting of the sheets with accelerated working method.

The device created according to the invention to solve this problem is characterized by an inclined guide plate and conveying elements that extend along the guide plate and a Define the movement path for the belt that is being moved in between, one at the upper end of the movement path arranged folding plate that forms an acute angle with the guide plate, one above the upper one End of the guide plate and the conveyor elements arranged pivotable guide for guiding the upper part of the belt over the upper edge of the folding plate, a control arrangement consisting of pivotable angle levers for folding the upper part of the tape over the upper edge of the folding plate, and a vertically displaceable one arranged in the gap between the folding plate and the guide plate Cutting knife.

The device designed in this way ensures precise cutting without endangering the Sheets and a significantly increased performance compared to manual work.

The inventive method for separating individual sheets from one by continuous Lamination of overlapping paper sheets formed tape consists in that the tape in the zone the overlapping end edges of the sheets resting on the laminated material are folded, wherein the sheets of the tape face outwards, and the laminated material along the formed The fold line is cut.

Separation device and method
printed sheets of paper from one
discontinuously moving, through
Lamination with a thermoplastic
Material connected band of overlapped sheets

Applicant:

Coverphan Italiana S. r. 1., Milan (Italy)

Representative:

Dipl.-Ing. W. Kuborn, patent attorney,
Düsseldorf, Brehmstr. 23

Named as inventor:
Alfred Vaer0, Copenhagen

Claimed priority:

Denmark 10 July 1963 (3287)

The drawing schematically illustrates a preferred one Embodiment of the device according to the invention.

F i g. 1 shows the longitudinal section of a band of overlapping sheets of paper in an enlarged representation;

F i g. Figure 2 illustrates the same tape in the folded position for cutting;

Fig. 3 gives a side view on a smaller scale the device again with the omission of some parts;

FIG. 4 shows the device according to FIG. 3 in a changed position;
F i g. Fig. 5 is a front view of the device.
Like F i g. 1 shows, the tape or the web 1 consists of the paper sheets 1 α with overlapping end edges, on which a layer 2 of, for example, thermoplastic material has been applied in a laminating machine. Through this

709 517/70

Claims (2)

the sheets form a continuous band which is held together by the layer of thermoplastic material. F i g. 2 shows the folding of the tape over a folding plate 3, under which a knife 4 is arranged for cutting through the plastic layer. From Fig. 3 and 5 can best be seen how the tape 1 from a supply roll S with the help of a drive belt drive, which consists of pairs of pulleys 6 with co-operating with these endless rubber belts 7, and other members against a guide plate 8 and sliding discontinuously over the is moved forward. The driver belt drive 6, 7 is driven by an electric motor 20 via a driver chain 21 which is placed over a sprocket 22. The sprocket actuates the drive shaft 24 of the driver belt drive 6, 7 via an electromagnetic coupling and braking device 23. The chain 21 also engages in the sprockets 25 and 26, which control the movement on the roller 5 and on a brake belt drive generally designated by the reference numeral 29 transmitted via the electromagnetic coupling and braking devices 27 and 28, respectively. The brake belt drive 29 consists of a frame 30 pivotably mounted on the shaft 31 and a counterweight 32 which presses the belt 33 looped around the pulleys 34 and 35 against the roller 5. The pulleys 34 and 35 are mounted on the shafts 36 and 31, respectively. The brake belt drive 6, 7 makes it possible to keep the belt 1 under tension during operation and during braking of the device. The knife 4 is located between the guide plate 8 and the folding plate 3. In the exemplary embodiment shown, it is actuated by piston rods 9 of pneumatic cylinders 10. A number of guide rails 12 are arranged on a rotatable shaft 11 above the guide plate 8. On the shaft there is also a thumb 13 which cooperates with an arm 14 arranged on another rotatable shaft 15. The shaft 11 is equipped with a spring member, not shown, which moves the guide rails 12 downward against the stops 16 in the form shown in FIG. 3 removable position presses. Two arms 17, which carry a folding plate 18, are arranged on the shaft 15. The latter has resilient, bent-over parts 19 on one side, which move freely between the guide rails 12 when the shaft 15 rotates. F i g. 3 and 4 show the arms 17 and the guide rails 12 when the two rotatable shafts are in their end positions. In the embodiment described, the shaft 15 is actuated by pneumatic cylinders 43, the piston rods of which engage with their toothed racks 37 in the pinions 38 keyed on both ends of the shaft 15. The pneumatic cylinders are connected via a pipe system (not shown) to the air tank 39, to which compressed air is fed from a compressor 40. The device has a sensing element 41, which responds to differences in the thickness of the strip 1 and influences the control current of the device, which regulates the electromagnetic clutch and braking devices and the electric motor 20. The operation of the device is as follows: The paper tape 1 is fed from the supply roll 5 between the fixed guide plate 8 and the discontinuously driven rubber belts? guided on a distance which corresponds to the length of a sheet of tape reduced by the overlap. The belt moves up and goes as shown in FIG. 3 shows past the folding plate 3. It comes into contact with the guide rails 12, which ίο push the tape away to the side. The tape is advanced until the leading edge of the following sheet is level with the folding plate 3, as shown in FIG. 2 shows on an enlarged scale. Here the movement of the tape is interrupted by the sensing element 41. The pneumatic cylinders 43 rotate the shaft 15 clockwise, as a result of which the bent parts 19 fold the paper tape over the folding plate 3 and press it against it. The tape is now held on one side of the knife by the rubber belt 7 and on the other side of the knife by the pressure of the bent part 19 against the folding plate 3. The knife 4, the sharp edge of which is beveled against the edges of the paper sheets, is then moved against the band 1 by the pneumatic cylinders 10 and cuts the band starting at one edge. While the shaft 15 is in the in F i g. 4 rotates, the arm 14 actuates the thumb 13 on the shaft 11 and rotates the guide rails 12 into the position shown in FIG. 4, the knife being able to move freely past the guide rails 12. The cut sheet falls along the folding plate 3 onto a collecting device which is not shown. The work cycle is then repeated again. In a modified embodiment, the device can be connected directly to the laminating machine. The various drive elements are controlled by electrical circuits, the control panel of which is indicated by the reference number 42. Such circuits can be designed in a manner known per se and are not shown since their special features do not form part of the invention. Patent claims: 1. Device for separating printed paper sheets from a discontinuously moving, overlapped tape connected by lamination with a thermoplastic material Sheets, characterized by an inclined guide plate (8) and conveyor elements (6,7), which extend along the guide plate (8) and a movement path for the between delimit the advancing belt (1), one arranged at the upper end of the movement path and with the guide plate (8) an acute angle forming folding plate (3), one above the pivotable guide (12) arranged at the upper end of the guide plate and the conveyor elements for guiding the upper part of the tape (1) over the upper edge of the folding plate (3), a Control arrangement, consisting of pivotable angle levers (17,18) for folding the upper Part of the tape (1) over the upper edge of the Folding plate (3), and a vertically displaceable, in the gap between the folding plate (3) and the guide plate (8) arranged cutting knife (4). 2. Procedure for separating individual sheets of a band formed by continuous lamination of overlapping sheets of paper, thereby characterized in that the tape in the zone of the overlapping end edges on the laminated material is folded over the sheets against the adjacent material, with the sheets of the tape facing outwards and the laminated material is cut along the formed fold line. 1 sheet of drawings 709 517/70 2.67 © Bundesdruckerei Berlin