US1825928A - Positioning means in paper cutting machines and the like - Google Patents

Description

. Oct. 6, 1931. K. STEGMANN 1,325,928

POSITIONING MEANS IN PAFER CUTTING MACHINES AND THE LIKE Filed Aug. 7, 1930 Fig. 2.

K. (SEQ 13 vmmn IIVY'EJI/TOIZ Patented Oct. 6 1931 STATES KARL STEGMANN, OF BAUTZEN, GERMANY, ASSIGNOR TO JOI-INE-WERK GRAFISCI-IE MASCHINEN-AKTIENGESELLSCHAFT, OF BAUTZEI'I, GERMANY POSITIONING MEANS IN PAPER CUTTING MACHINES AND THE LIKE Application filed August 7, 1930, Serial No.

This invention refers broadly to cutting machines for paper, cardboard and the like in which a displaceable member sometimes called a saddle is mounted as a rest or impinging means upon a supporting table for the pile of paper, cardboard or the like. Various means have been suggested heretofore to indicate the relative position of the saddle on the table, but as heretofore constructed these devices were unsatisfactory in view of the fact that their manufacture was expensive and the indications were not sufiiciently accurate, and with a great many devices of this kind there was the difficulty that the;

interfered with the operation and manipulation of the machine. Now this invention in which the position of the saddle is indicated by means of a tape or ribbon moved by the saddle is intended to overcome these difficulties and to facilitate the manipulation of the machines of the kind referred to. In its broad features the invention comprises the mounting of the scale-carrying tape or ribbon upon a pulley secured to the saddle and operated by the movement thereof. By this means it becomes possible to readily exchange the scale-bearing tapes or ribbons. so that standard tapes may be used and the manufacture thereof may be considerably cheapened. The tape which is preferably made of steel or the like may be so arranged as to be independent of the feeding means ordinarily employed for the operations of the saddle. In further pursuance of the invention provision may however be made to so arrange the tape that it will likewise serve as a feeding and pulling means for the saddle. In a preferred construction a mirror or an angle-mirror may be used with a view of facilitating the reading off of the scale or graduation which in this case will have to show indications in the inverted position.

The invention will be more fully described with reference to the accompanying drawings, showing the present improvements. Fig. 1 is a front view of a cutting machine provided with the device according to this invention. Fig. la is aplan View corresponding to Fig. 1. In Figs. 2 and 2a I have 0 shown respectively a front view and a plan 473,653, and in Germany October 25, 1929.

view of a modified form of construction. Fig. 3 is a section along the line a-a of Fig. 1.

In the embodiment shown in Figs. 1 and 1a the driving of the saddle-member 4 is .1;

effected by the pulling action of the ropes 1 and 2 which are passed around the saddle wheel 8 and the guide roller 9. A tape 3 which is provided with a graduated scale is placed around these feeding ropes 1, 2 and passes likewise around the saddle wheel 8 and the guide roller 9 and is connected at one end by means of an adjustable screw connection 6 to the saddle, while the other end of the tape is adapted to operatively engage the saddle by means of a spring 7. This provides for a ready adjustment of the tape measure. At the front side of the machine an indicator or pointer 5 is disposed, which cooperates with the scale marked on the tape,

band or ribbon. In view of the loose arrangemcnt'of the tape 3 upon the ropes 1 and 2 a slight relative movement of the ropes and of the tape with relation to each other is possible, so that any stretching or extension of the pulling ropes does not interfere with the accuracy of the tape measure.

At the front side of the machine a mirror or reflecting surface 10 is provided to facilitate the inspection of the scale. Said mirror showing the picture of the movable graduation in the direction of the sight. The mirror 10 may also serve as a lighting screen, in case the inspection of the scale has to be effected with unfavorable lighting conditions. This occurs for instance when the cutting of lightsensitive papers is effected in darkened rooms. In this case a lamp 11 may be secured to the table 12 by which means the reading off is facilitated without any possibility of interfering with the working operations. The graduation of the scale in the case of the combination with a mirror should, of course, be turned upside-down.

In the modified construction according to Figs. 2 and 2a two flexible steel ribbons 3 and 3a are provided upon which the measuring scales are disposed and which serve for the feeding of the saddle. The attachment of these steel ribbons or tapes at the saddle is ltd) similar to the exemplification described with reference to Figs. 1 and 1a.

It should be pointed out that the broad idea of the invention is not restricted to the particular embodiment herein shown by way of exemplification, and it should be understood that other alterations and modifications are possible within the ambit of the appended claims.

I claim 1. In a device ofthe kind described in combination, a sheet support and a movable sheet-confining saddle-plate, movable on said support, rotatable feeding means for the plate and substantially tape-like, loop-shaped graduated flexible measuring means, displaceably engaging the feeding means, and a reflecting member on said support, optically confronting the flexible measuring means.

2. In a device of the kind described the combination of asheet supporting member, a movable sheet confining impingement saddle plate movable along said member, a saddle wheel on the supporting member, flexible 2:- moving and operating means in the form of cables connected to the plate and trained aboutthe wheel, a flexible graduated measuring tape substantially co-extensive with said ca les, spring means interposed between the tape and the saddle plate, and adjusting means on the saddle plate engaging the measuring tape.

3. In a device of the kind described the combination of a sheet support, a saddle plate :5 movablevon the support, means for feeding the plate, a flexible graduated measuring tape operatively mounted on the support and the p ate, and a reflectingmember mounted on the support andin the field of vision of the operator so that the operator may without changing his position observe both the graduations on the tape and the, sheets on the support.

In testimony whereof I affix my signature.

.3; KARL STE GMANN.

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