DE2942578A1 - PRINT WORK - Google Patents

Description

PRINTING

The invention relates to a printing unit according to the preamble of claim 1, with which several texts The front and / or back of a document, e.g. a check, can be written.

Lichock-5s often need to be on both when issuing Pages with information such as the amount of the check etc. are written on, which can be deciphered with magnetic or optical readers meant to be.

Previously, the checks had to go through the writing device a second time after writing on one side to run. This means a loss of time and a risk of errors due to the difficult handling of paper.

These disadvantages are to be eliminated with the printer according to the invention. In the printer according to the invention the front and back are labeled at the same time.

The invention relates to a printing unit with a plurality of heads, each head being accommodated in a carriage and contains a character wheel, on the circumference of which the characters to be printed are engraved, with the rotary movement Each character wheel is reached by its own motor, the one on the associated carriage Encoder is controlled, and the longitudinal movement of the carriage in line direction on rails with the help of a Reached the main motor arranged outside the slide

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while the pushing motion of each character wheel in Direction towards the document is obtained with the help of an electromagnet, characterized in that the heads on the

so the front and back of the document / are arranged, since β the writing heads on the rear side are arranged at a height that is different from the height of the heads on the front side, while the heads on the front under each other as well as the heads on the back under each other in a common Height are arranged.

With reference to an embodiment, the invention will now be explained in more detail with reference to the drawings. The same components are provided with the same reference symbols in the various figures.

Fiy. 1 shows a schematic view of an inventive Printing unit with three heads.

Figures 2 and 3 show the same printing unit from the side and from the front.

Fig. 4 shows an enlarged schematic side view of a head.

Figures 1 to 3 show a printing unit with three writing heads 1, 2 and 3. The heads 2 and 3 lie on one Side of a document 4 for printing the front side and the head 1 is used for printing the back side. Between the Head 1 for the back and heads 2 and 3 for the front are provided with a passage for documents 4 that pass through a conveyor belt 5 can be brought into the printing position with the aid of the sensors 6 which control the belt feed and the belt stop.

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The heads ? and 1 for the front are at the same height, while the head 1 for the back is at a different height. The heads 1, 2 and 3 are housed in carriages which slide on guide rails such as 7, 8, 9, 10, the rails 9 and 10 being the two carriages of the heads 2 and 3 and the rails 7 and 8 being the carriage of the head 1 wear. The displacement of the three carriages for the three heads 1, 2 and 3 is done by a fond oirisan.er. Sc'r.r lctmotor Ii caused, which is controlled by an encoder, which receives its instructions from a memory, not shown here. The axis of the motor 11 takes two toothed belts 12 and 13 with it, of which the belt 12 has a driving finger 14 for the carriage of the head 1 and the belt 13 has two driving fingers 15 and 16 for the two carriages of the heads 2 and 3. When the front writing heads 2 and 3 write from left to right, the back head 1 writes from right to left because the three carriages move in the same direction.

In Fig. 4, a print head 2 is shown in detail. It consists essentially of a character wheel i7 with only "the periphery its upper part ¹ B engraved characters to be printed on the documents. The each character to be printed is selected by rotating the character wheel having formed in its lower part as a toothed wheel 19 and is driven by a gear 20 seated on the axis of the motor 21. The motor 21 is a stepping motor which is controlled by an encoder 22 which consists of a

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Feelers interacting disc consists. The encoder 22 is controlled by commands from a not shown here Memory originate. These commands are entered with a keyboard known per se.

The drawing wheel 17 has an axis of rotation 23 which sits on a joint lever 24, the joint of which is perpendicular lies under the end of the character wheel facing the document 4. This makes the flapping movement of the writing wheel at the level of the character reduced to a minimum when printing. This striking movement is with the help of an electromagnet 26 and a Spring 27 is generated, the electromagnet being controlled by the memory. By the flapping movement of the drawing wheel ! .7 the gear 19 is related to the gear 2O, which is fixed, postponed. The drawing wheel l7 also has a toothed washer 23 which is provided with slots, whose Number is equal to the number of characters. "in never the Srhli'ctsri Fsstverbundener immovable pin 29 ensures that the drawing wheel engages during the printing movement of the pin 29 reaches the correct position in the corresponding slot of the toothed disk 28. Two on the frame of the Anvils 30 attached to the printing unit lie in each case with the characters on the drawing wheel 17 on both sides of the document 4 opposite to. Each of the anvils 30 is elongated in shape and has a length that is at least: ieion clan »distance between the feed and the stop sensors 6 is. The anvils 3O serve to force the pressure blow of the drawing wheel through the document and take a ribbon 3 1.. The ribbon 31 is in height

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of the Zeiehenrädcner.s 17 over several rollers 32 and 3 3 out. A motor 34 attached to the frame and independently of the carriage is used to tension the ink ribbon and to wind it up on a spool 15. It can be a second, not shown here Motor is provided to operate the delivery coil. The ink ribbon 31 remains unmoved during the printing process and is only pushed through when the carriage moves back Movement moved on.

The printing unit works as follows: The document 4 fed by the conveyor belt 5 is stopped. The three printheads 1, 2 and 3 receive then the necessary to select the character to be printed, in I: jrmatio / ian. The three drawing wheels' 7 guide the printing of the characters with the help of their electromagnet 26 before the three print heads 1, 2 and 3 move one step at the same time be moved on. The three heads assume their new positions, which are necessary for the characters to be printed here, print

around these characters and are then moved one step further. This process repeats itself until the desired one Text is written.

It remains to be noted that the three heads are linked in terms of their feed (same motor 11), however, in relation to the choice of characters (three motors 21) and the Druckbüvregang (three electromagnets 26) from each other are independent.

The invention can be used in the au torn Irish machining of documents, where the transport, the printing on the front and back and the output of the Documents are done automatically.

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Claims (1)

Fo Ll 445 D SOCIETE POUR L * AFFRANCHI3SEMENT ET LE TIMBRAGE AUTOMATIQUES (S.A.T.A.S.) S.A. 107, rue Henri Barbusse 9211L CLICHY CEDEX France PRINTING UNIT PATENT CLAIMS 1 J printing unit with multiple heads, each head in a slide is housed and contains a drawing wheel, on the circumference of which the characters to be printed are engraved The rotation of each character wheel is achieved by its own motor driven by a Associated carriage existing encoder is controlled, and the longitudinal movement of the carriage in the line direction Rails is reached with the help of a main motor arranged outside the carriage, while the pressure movement of each Character wheel is obtained in the direction of the document with the help of an electromagnet, thereby characterized in that the heads (1,2,3) are arranged on the front and back of the document (4) so that the writing heads (1) of the back are arranged at a height which is from the height of the heads (2,3) of the front is different, while the heads on the front under each other as well as the heads on the back under each in are arranged at a common height. 030019/0744 ORIGINAL INSPECTED 2 - Printing unit according to claim 1, characterized in that the main motor (11) all carriages for the print heads (1,2,3) with the help of belts (12,13), the at least one with the carriage cooperating driver fingers (14,15,16) have moved in the same row direction. 3 - Printing unit according to claim L, characterized in that there are 3 two elongated fixed ones Anvils (30) opposite the drawing wheels (17) of the writing heads on one or the other side of the document (4) are arranged. 4 - Printing unit according to claim 3, characterized in that the drawing wheel (17) has an axis (l3), the lower end of which is fixedly connected to a lever (24) which is vertically below the The end of the pin (25) arranged in front of the anvil (30) is rotatable. 5 - Printing unit according to claim 4, characterized characterized in that the drawing wheel (17) is firmly connected to a disc (28) on the circumference Has slots, the number of which is equal to the number of characters present on the character wheel, the slots cooperate with a rigid pin (25) present on the slide, around the character on the drawing wheel (17) at the time of pressing by engaging the pin (29) in to center the corresponding slot in the printing position. 030019/0744 ORIGINAL INSPECTED