DE2411989A1 - DEVICE FOR CUTTING RECORDING MEDIUM SUCH AS PAPER - Google Patents

Description

PATFMTiM ¹ A ¹ XtTj

DR. LWIiGAND ClPL-ING W. NIEMANN

9/1 I.

DR. M. KÖHLER DIPL-ING. C. GERNHARDT Z4 I I

MÖNCHEN HAMBURG

phone = 395314 2000 HAMBURG 50, ^ C » _ηϊ

TELEGRAMS: KARPATENT ICÖNIGSTRASSE 28 ^{J |} M ff

Tel. No. 231233 ·:

Telex: 21297? karpd

W. 26178/74 12 / Re.

The Singer Company-Elizabeth, New Jersey (V.St.A.)

Device for cutting recording media such as paper.

The invention relates to a knife cutting device for cutting recording medium, · And especially for cutting paper that is pulled from a roll, especially in the case of sales registration devices which have a roll of paper on which the individual sales or sales transactions are printed and the cut to create a receipt for the customer.

Knife cutters for cutting media withdrawn or unwound from a roll have been used in mailing machines as described in U.S. Patent 3,062,133. According to this patent specification, the knife cutting device described there has a rotary cutting bar and a stationary knife blade which cuts the paper transversely when the bar is rotated. The rotating rod has a planar surface forming the cutting edge, and when the rod is rotated with paper placed therebetween, this cutting edge interacts with the cutting edge of the stationary knife blade engaged trainees to a cutting operation "409839/0740

to lead.

However, there are maintenance problems with this known cutting device. The setting of the blade edges relative to each other is critical to proper cutting and it is difficult to align the two even if a guide device is used. Furthermore, the guide device is difficult to remove, when it is necessary to remove the stationary knife blade for sharpening, and also reassembly and alignment are difficult. This makes this known device difficult and expensive too wait.

Although in the known "device the cutting knife works extremely satisfactorily when paper with a width of about 40 mm has to be cut, the difficulty of aligning the knife edges makes it impractical and practically impossible to get wider To cut paper about 80 to 90 mm wide.

One purpose of the present invention is to obviate or at least eliminate the disadvantages described above to reduce.

According to the invention there is provided a cutter for cutting recording media such as paper. This device comprises means for advancing the medium through the cutting device, a rotary knife provided with a cutting edge, one with a. A stationary knife provided with a cutting edge, which is flexible, is bent or curved in the direction towards the rotary knife and can engage with the latter and is bent when the rotary knife is rotated in order to carry out a cutting operation on the recording medium located between the knives, furthermore a device for attaching the stationary knife and the rotary knife in cutting engagement with one another, and with a device for operating the rotary knife.

An embodiment of the invention is described below For example, explained with reference to the drawing. • 409839/07 4 0

Fig. 1 is a perspective view of a portion of a registration device shown schematically to show the location of the customer receipt delivering station comprising a cutting device according to the invention and its cooperation with the remaining parts of the registration device including a matrix printer which a customer _ to be delivered document that is cut, printed.

Fig. 2 is a side view of the cutting device, whose rotary knife is shown in the cutting position, with continued in interrupted Lines the position for access to the 'stationary knife is shown.

Fig. Jj is a side view of the cutting device, viewed in the opposite direction with reference to FIG.

FIG. 4 is a side sectional view of the cutting device taken along line 4-4 of FIG. 1.

Fig. 5 is a side sectional view taken along the line 5-5 of Fig. 1, with the rotary knife weggeschwer.kt and additionally from the stationary knife also shows the manner in which the stationary knife is used for maintenance can be easily removed from its position,

6 is a schematic illustration of the cutting device with a bend or curvature in FIG the stationary knife, for the purpose of clarity of understanding of the invention is exaggerated.

Fig. 7 is one for the purpose of clarity of understanding the operation of the cutting device according to the invention on an enlarged scale held view of the cutting device.

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In Fig. 1 there is shown a data registration device Io, the cover of which is for the sake of clarity is removed. The device Io comprises a carriage 12 which is laterally movable with respect to a frame 14, a platform 16 with three printing stations 18, 2o and 22, and a keyboard 24. The three printing stations are one Receipt printing station 18, at which a receipt is printed out for the customer, if one. Receipt is required a booking station 2o, at which a booking list of the seller or the like is printed for all sales transactions, and a forms printing station 22 at which a customer's order or sales invoice is printed, if any it is required.

In the embodiment shown, the carriage 12 can move out of the position shown, i.e. the position on the booking station 2o and the receipt printing station 18, also in a position at the form printing station 22 and the Booking station 2o move and move across each pair of stations so that corresponding rows and columns from data entered on the keyboard 24 in the registration device Io can be properly printed out. The carriage 12 is attached to two rods 26 and 28 which hold the carriage 12 parallel to the platform 16. Transverse movement of the Carriage 12 on the parallel rods 26 and 28 is caused by a drive device J5o which has a belt ^ 2, associated with carriage 12 and pulleys; 54 having. The movement is caused by a reversible motor, not shown.

In the illustrated embodiment, a receipt J56 is printed in the receipt printing station 18, if necessary, and a booking list J> 8 is printed in the accounting station 20 when the carriage 12 is in the illustrated position. The two recording media (paper) for the receipt printing station 18 and the booking station 2o are moved forward, ie moved in the direction of the keyboard 24, from a supply, for example a paper roll by means of a roll feed device 4o, which is driven by a motor and one with a

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Shaft 44 coupled coupling device driven will. If the carriage 12 is arranged to the left of the position shown, a will be in the station 22 Form 46, for example a sales order or a sales invoice, at the same time as the booking list ^ S printed.

The booking list 38 is rolled onto a roll 48, which is partially shown in FIG. 1, while the receipt 36 is cut off by a cutting device 62 when all the data has been recorded or printed. Furthermore, the form printing station 22 is provided with two electronic sensing devices 50 and 52, they determine when a form 46 is correctly arranged in the form printing station 22 by, if this is not the case, the registration device Io is blocked from working. Rollers 54 move the form in a direction opposite to the direction of movement of the booking list 38 by means of a transmission which is provided in order to couple the rollers 54 to a shaft 42, which the form 46 and the booking list 38, or the booking list 38 and the Receipt slip 36, or posting list 38 alone, as required, to be incrementally moved upon response to and in combination with the printing means to form rows and columns of data as indicated by input on keyboard 24 is determined.

The carriage 12 is further provided with two matrix printing devices 56 and 58, which are simultaneously on two the three stations 18, 20 and 22 can print, for example at the receipt printing station 18 and the booking station 2o, or, if the carriage 12 is arranged to the left of the position shown, at the form printing station 22 and the booking station 2o.

For the correct arrangement of the rows and columns of the characters to be printed on the recording medium is the combination of a mechanical strobe device 60 and a cooperating electronic

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Facility provided.

Furthermore, in Flg. 1 schematically shows an ink supply device for the double matrix printing device which is arranged in the carriage 12.

A detailed description of the mechanical strobe and electronic equipment to properly align the characters on the recording media and the ink feeder for the printing means is not done because the present invention relies on the cutting device for cutting off a receipt for the customer is directed at the receipt printing station l8. This cutting device 62 is described in detail below.

It should be noted here that the matrix printing devices are relative to the printing on the booking list 38 and a form 46 on the receipt from below. This printing on receipt 36 with the downward facing " Upper side enables the recording and totaling of the entire process, for example a sales process in a manner in which any such process is usually read, i.e. top to bottom, what is to the buyer's gate part. This also applies to the form 46 printed at the forms printing station 22, as the form is moving in a direction corresponding to the Direction of movement of the document 36 is opposite. However, this does not apply to the printing of the booking list 38, which is stored in the machine in order to receive from the Suppliers to be used.

From FIGS. 2, 3 and 4 it can be seen that the cutting device is designated generally by 62 and ■ a rod-like rotary knife 64 and a stationary knife 66, both in two side plates 68 and 7o are attached.

Each side plate 68, 7o is provided with an opening, in which the knife blades operate and end walls 72, one of which is shown in Figure 2, form one Stop or shoulder on which the stationary knife

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66 rests when inserted into grooves 74, one of which is shown in FIG. The shoulders 72 and the grooves 74 serve as guide means for accurate Arranging the stationary knife 66 in the cutting device 62. The rotary knife 64 is on two pivot arms 76,78 attached around one in the side panels Swivel 68.7o attached shaft 80. The pivot arms 76, 78 are provided with bearing surfaces in the form of grooves 82, one of which is shown in Fig. 2 and which open towards the stationary knife 66, as shown in FIG. These bearing surfaces 82 support a portion of the reduced diameter of the pivot knife 64 for rotation in it.

It can be seen from FIG. 3 that a connection in the form of a link arm 84 is also provided and a lever 86 pivotally connected to each other. The lever 86 is attached to the rotary knife 64 and serves to rotate the rotary knife 64 when the control arm 84 is actuated.

To provide a cutting edge on rotary knife 64, the central portion of the rod is cut away, as shown at 88, so that a flat surface is created which extends axially the length of the rod, with the exception of an area near the rod, of course Ends that create the bearing surfaces for rotation of the rod in bearing surfaces 82. The flat part in this way creates a precise cutting edge 9o on the rotary knife 64 which, when actuated, causes a cutting operation by engaging a cutting edge 92 on the stationary knife 66 , which is formed by an inclined surface 94.

From Fig. 4 it can be seen that the connection for rotating the rotary knife 64 is actuated by a device is, for example, a device with cams or solenoids, a cam 96 is shown, which is with a cam follower part 98 is engaged, deT at a

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Hanger device loo is attached. The suspension device loo comprises two cam arms Io2 and Io4, which are connected in the middle Ιοβ in such a way, that a loop is formed over a shaft I08 which rotates with it. The suspension device loo is biased in a direction to the position shown in Fig. 4 by a return spring Ho, the is connected at one end to the arm Io4, and at the other end to the side plate 7 o. That way serves Actuation of the cam 96 for this purpose, the hanger loo to move against the force of the biasing spring Ho, so that movement of a second cam follower part 112 is caused, with which the arm Io4 is engaged in a clearance slot 118. The cam follower part 112 is attached to the handlebar 84 (Fig. 3) and attached to the arm Io4 by means of a rivet 12o. At the right time, further rotation of the Cam 96 the biasing spring Ho a return of the Hanger device loo in its starting position shown in FIG.

In operation, paper withdrawn from a roll, not shown, is carried out via two guides 122 and 124 by means of two spring-loaded feed rollers 126 and 128 guided under the flat edge 88 of the rotary knife 64, if the the latter is in the position shown in FIG. Actuation of the cam 96 at the right time, detected by a signal input to the keyboard 24 causes the cam follower to move 98 upwards, causing actuation of the suspension device loo and the connection 84, 86, to rotate the rotary knife 64 in the direction indicated in Figs. 4 and 7, then the cutting edges 90 and cut across the paper. After such a cutting process and with further movement of the cam 96 leads Preload spring Ho turns the rotary knife 64 into that shown in FIG Position back so that the next part of the paper

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can be pulled over the knife by actuating the feed rollers 126, 128.

After describing the operation of the cutting device, the self-sharpening, the automatic Self-alignment and easy maintenance of the cutting device are described.

To explain the feature of self-sharpening reference is made to FIGS. 6 and 7 and 1.

In FIG. 6, the stationary knife 66 is shown bent in the direction of the rotary knife 64. In FIG. 7, the bevel on the cut-away surface 88 is shown greatly enlarged at 127, which forms a slightly inclined surface at an angle of approximately 15 from one end of the rod to the other, so that a bevel of the cutting edge 9o is determined. When the rotary knife 64 rotates, this cutting edge 9o engages with the curved cutting edge on the stationary knife 66 . The latter gives way and comes into engagement with this edge 9o in such a way that it is continuously pressed against the cutting edge 9o of the rotary knife "64 and yet bends under the influence of the cutting edge 9o, so that a continuous sharpening process is brought about and a cutting process at the same time on the material to be cut.

Regarding the maintenance of the cutting device, the automatic alignment of the stationary knife 66 is one Combination of bend in the knife, simplicity of guide 72 and 74, and ease of access to the stationary knife 66 and the rotary knife 64. As shown in FIGS. 2 and 4, the rotary knife 64 from the stationary knife 66 by means of the pivot arms 76 and 78 can be pivoted away by simply removing a fastener 13o, which is shown as shown in FIG a nuted hexagonal rod 132 extending through Holes in the pivot arm 76 and 78 and in the side plates 68 and 7o therethrough. Pivoting the Rotary knife 64 away from the stationary knife 66 enables the stationary knife 66 to be removed from the grooves 74,

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as shown in Fig. 5, as well as a rearrangement in the guide device 72, 74, after which the rotary knife 64 is again brought into the position shown in Figs. J5 and 4 'and is fixed by the fastening device 13o. The holes in the pivot arms 76 and 78 for the fastener Ij5o are slightly larger than the rod 132 to allow slight adjustment of the rotary knife 64 by rotation to the stationary knife 66 before the nut is tightened. When it is desired to remove and replace the rotary knife 64, this can conveniently be done with the pivot arms 76, 78 in the position for the stationary knife 66 to be removed.

From the foregoing it can be seen that a cutting device is provided which is improved That creates the added benefit of cutting action automatic alignment or alignment which self-sharpening occurs and which is easy to maintain. It has been found that self-sharpening works extremely well in practical use. Indeed Once set, the self-sharpening allows the cutter to "break in", leaving less torque is required to rotate the rotary knife 64 without loss of cutting ability.

The invention is above in connection with a data registration device in which the invention is extremely useful, however, the invention can can also be used in other applications.

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Claims (4)

Claims ι 1.) Device for cutting recording medium such as paper, with means for feeding the media through the cutter, one with a Rotary knife provided with a cutting edge, and with a stationary knife provided with a cutting edge, thereby characterized in that the stationary knife (66) is made flexible, in the direction against the rotary knife (64) is curved or arched and can engage with it and is bent when the rotary knife is turned, for performing a cutting operation on recording medium located between the knives, a device (72,74,76 to 82) is provided for attaching the stationary knife and the rotary knife in cutting engagement with each other, and that a device (84,86,96 to 12o) is provided for actuating the rotary knife. 2. Apparatus according to claim 1, characterized in that the cutting edge (90) of the rotary knife (64) for improvement the cutting effect is formed slightly obliquely. J. Device according to claim 1 or 2, characterized characterized in that the knife attachment device includes guide means (72,74) for locating the stationary Knife (66) and pivot arms (76,78) for arranging the rotary knife (64) in cutting engagement with the stationary one Knife. 4. Device according to one of claims 1 to 3, characterized in that the actuating device has a cam device (96,98) and a connecting device (Io2, lo4, lo6), of which the latter is connected to the rotary knife (64) and at Actuation of the cam device is movable to rotate the rotary knife. 409839/0740