DE7514098U - Cutting device for paper webs on printing devices - Google Patents

Description

TRIUMPH WERKE NUREMBERG O.

Corporation
8!) Nuremberg, Further Straße 212

EP / Sy / Re / 1064 April 28, 1975

Cutting device for paper webs on printing devices

The innovation relates to a cutting device for paper webs at printing facilities, for example wire printers, that open a a guide rod parallel to the pressure abutment, which can be moved along and rotated to a limited extent around the guide rod Has carriage, which is offset by the longitudinal movement of the same, provided with a rolling surface Radwesser carries the Cutting process cooperates with a stationary, provided with a shear edge paper guide bar.

For printing facilities such as typewriters, accounting machines and Writing units with a print head, in which paper webs are continuously inscribed, are cutting devices for recording media known with movable fixed knives, rotary knives or wheel knives that cut off the labeled paper webs at any time enable. To with such a cutting device; one? sajberen To achieve a cut, a jig must also be used during the cutting process or a hold-down device of the labeled recording medium is actuated will. Such a clamping or hold-down device is, for example, a pressure strip or one under spring pressure Rolleand ^ ücksysiem designed. Such solutions therefore require also corresponding actuation mechanisms.

The object of the present innovation is therefore to provide a cutting device for creating paper webs, which with an eirfochon, Reliable in function and no operation required is provided.

According to the innovation, a Abs-'uneidvorrichtung for paper webs on Dn ¹ , ^ devices of the type described at the beginning is created so that a stationary belt is stretched parallel to the paper guide bar on the side facing the platen, which acts as a hold-down device for the between the belt and the guide bar continuous paper web is used, and the rolling surface of the Radnesser rolls on this tape with longitudinal movements of the knife carriage, the paper web being pressed during the cutting process in the cutting area by the rolling surface over the tape against the paper guide bar.

An embodiment of the innovation is explained in more detail below with reference to the drawing. Show it:

Fig. 1 is a front view of the cutting device,

Fig. 2 is a side view of the cutting device,

3 is a plan view of the wheel knife,

Fig. 4 is a side view of the wheel knife.

The cutting device shown in the drawing is assigned to a dot matrix printer, not shown. This cutting device is accommodated within an inner frame, the two side plates 1 of which consist of two plate elements 2 on an outer one the frame belonging to the printing unit are attached. A round connecting rod 3 is arranged between the two side plates 1 of the inner frame, on a soft paraiiei to the direction of the row left and right a knife carriage 11 is moved. This knife sledge 11 is mounted on the connecting rod 3 so that it can rotate to a limited extent and carries on the axis 15 sin RadiTiesser 12, the one with his Cutting edge 13 on the shear edge 5 one between the side plates 1 stationary paper guide bar 4 is applied. Above

dor paper guide bar 4 is between the side plates 2 of the outer .frame e-ir.e flat bar attached to which a pressure abutment 7 forms for the needle printhead, not shown, of the printing unit, not shown, which is guided past it, the Paper web 16 is guided from below over the paper guide strip 4 and over the printing plane of the platen 7.

On the side of the cutting device facing away from the pressure abutment 7 the side plates 1 of the inner frame are connected by a support rail 6, on which an electric motor 8 for sliding of the knife carriage Π is attached to the connecting rod 3. The power transmission from the electric motor 8 to the knife carriage

11 takes place via a toothed belt 10, both ends of which are cm knife slides 11 are attached and which is guided over two pulleys 9, which are also mounted on the support rail 6. On the The support rail 6 is also attached to the knife carriage 11 under spring tension bow 19 is supported by means of a roller 20, which over the knife carriage 11, the wheel knife 12 with its cutting edge 13 always presses slightly resiliently against the shear edge 5 of the guide strip 4.

Between the side panels 1 of the inner frame is opposite the Paper guide bar 4 parallel to the same a stdiona ^ es belt tensioned, which serves as a hold-down device for the paper web 16 to be written. The distance between the band 17 and the guide strip 4 is dimensioned so that the passage of the paper web 16 when line switching is not hindered.

The racing knife 12 carried by the knife carriage 11 on the axis 15 is provided on one side with a stepped rolling surface 14, the smaller circumference than the cutting edge 13 of the red knife

12 has. During the cutting process, i.e. when moving the Mcsser-

schiittens

7514098 09/25/75

is the red knife 12 by rolling on the belt 17 in jcohirg offset and presses the paper web 16 against the guide bar 4, or its shear edge 5, which comes into engagement with the cutting edge 13 of the Radmejpers 12. The wheel knife 12 performs scr it simultaneously a progressive and a rotating movement ous, the peripheral speed of the cutting edge 13 of the Radrness, rs 12 is greater than the speed of movement. Thereby is eir. clean cut guaranteed.

The knife carriage 11 with cutting knife 12 is at Sc gang on the junction 3 in both directions verschiebbor and its starting positions can be at both ends of the connecting rod 3 or at any point thereof according to the Width of the paper web to be labeled can be selected.

In order to provide additional guidance for the tape 17 relative to the paper guide bar 4 can be reached on the carriage 11 on both sides of the wheel knife 12 in the area of the belt 17 each with a peer guide roller 18 attached, which roll on the two flat sides of the board (Fig. 3) · and parallel to the axis 15 of the rednesser V? disordered are.

The hold-down device for the paper webs according to the innovation is soT.it i'-rer operational and required during initiation and during the Cutting process no actuation.

- Protection claims -

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Claims (3)

• · · I TRIUMPH WERKE NÜRNBERG Aktiengesellschaft 85 Nürnberg, Further Strasse 212 EP / Sy / Re / 1064 April 28, 1975 Claims for protection 1. Cutting device for paper webs on printing devices, For example, wire printers, which can be moved along a guide rod parallel to the platen and around the Guide rod has limited rotatable arranged carriage, which carries a by the movement of the same in rotation provided with a rolling surface provided wheel knife, the interacts during the cutting process with a stationary paper guide bar provided with a sheared edge, thereby characterized in that parallel to the paper guide bar (4) on the side facing the platen (7) a stationary belt (17) is tensioned, which serves as a hold-down device for the paper web (16) passing through between the belt (17) and the guide bar (4), and the rolling surface (14) of the wheel knife (12) during longitudinal movements of the knife carriage (11) on this tape (17) unrolls, the paper web (16) during the cutting process in the cutting area, the tape (17) through the rolling surface (14) pressed against the edge guide. 2. Cutting device according to claim 1, characterized in that the knife carriage (11) on both sides the rolling surface (14) of the wheel knife (12) in the area of the belt (17) • parallel to the axis (15) of the wheel knife (12) guide sleeves (18) are arranged, which represent an additional guide of the tape (17) relative to the paper guide bar (4). 3. Cutting device according to claim 1 and 2, characterized in that the wheel knife (12) always means 7514098 25.u9.75 a pressure device acting on the knife carriage (V,) to spring slightly against the cutting edge (5) of the guide bar (4) :. ' is pressed. 7514098 09/25/75