FR2652781A1 - Flatbed (plane) printing head - Google Patents

Abstract

Device making it possible to improve the principle of flatbed typographic printing, of adhesive labels, cardboard, with or without a support, as well as any other material capable of being printed. The invention relates to a device making it possible to make the printing system mechanically independent of the machine in which it is installed, as well as to separate the inking function from the marking function. It consists of a body (1) on which a felt (2) impregnated with ink is fixed. The inking roller (3) moved by the jack (4) and subjected to pressure by the springs (5) is impregnated with ink by rolling on the felt (2) and releases it on the composing stick (stamp) (6). The jack (7) presses the composing stamp (6) onto the product and produces the impression (printing). The device according to the invention is in particular intended for printing and marking.

Description

 Device for improving the principle of typographic flat printing of adhesive labels, cartons with or without support, as well as any other material that can be printed.

 The flat typographic printing was carried out using a connecting rod / crank print head mechanically connected to the machine, not allowing its movement, hence it is impossible to position the marking perfectly on the label.

The inking and marking functions are not dissociated:
- inability to do intaglio marking
- limited number of markings / minute because movement of the whole head
- obligation to always work with similar characters
height (pressurized by connecting rod).

The device according to the invention overcomes these drawbacks.

 I1 indeed has, according to a first characteristic, a body on which is fixed one or two felts soaked in ink.

One or two rollers, driven in an independent movement and subjected to a pressure by the springs, are impregnated with ink by rolling on the felts and return it on the composter.

The composter animated by an independent movement is put under pressure on the product to carry out the printing.

According to particular embodiments:
- the body is not animated by any mechanical movement in connection with
the machine, it can be adjusted in two directions
- one or two felts are attached to the body
- one or two ink rollers take and deposit the ink
- the roller (s) are driven by a given independent movement
either by rotary or linear actuator, electromagnet or motor in
direct or through sets of sprockets or
rods
- the ink roller (s) can be moved
single or round trip per cycle
- the composter can be guided by ball bushings or by rod
anti-rotation cylinder
- the composter is the only moving part during the
marking, allowing higher rates
- the composter is driven by a given movement, either by cylinder,
electromagnet or motor independent of that of the rollers
- the marking being done by pressure of the composter on the product,
possibility of using characters and products of heights
different without adjustment.

The inking and marking functions being dissociated, the user has the possibility of making intaglio marking without inking.

The accompanying drawing illustrates the invention.

Figure 1 shows in perspective the device according to the invention.

With reference to this drawing, the device comprises a body (1) on which is fixed two felt pens (2) soaked with ink. Rollers (3) two in number, kept in pressure on the body (1) by springs (5) and set in motion by a jack (4) make a rotation of 1800
They impregnate ink by rolling on a felt (2), restore this ink while passing over the composter (6) and are placed at the end of travel on the other felt (2) while waiting for a new cycle.

 The composter (6) guided by pins (8) and ball bushings is set in motion by a jack (7). Then, the composter (6) comes into pressure on the product and performs the printing.

According to a variant not illustrated, the movement given to the ink rollers (3) can be done by means of pinions or rods.

As a non-exhaustive example, this printing system can be fixed on labeling machines.

The device according to the invention is particularly intended for printing and marking.

Claims (7)

 1) Device making it possible to improve the principle of flat letterpress printing, characterized in that it comprises a body (1) on which are fixed two felt-tip pens (2) soaked in ink. The rollers (3) set in motion by the jack (4) and subjected to a pressure by the springs (5) become impregnated with ink by rolling on the felt (2) and return it to the composter (6), mistletoe is itself subjected to a movement given by a jack (7) to carry out the printing.  2) Device according to claim 1 characterized in that the body (1) is not driven by any mechanical movement.  3) Device according to claim 2 characterized in that one or two felts (3) are fixed on the body (1).  4) Device according to any one of the preceding claims characterized in that one or two rollers (3) are driven by a given movement either by cylinder (4) linear or rotary, electromagnet, motor, in direct engagement or by via sprockets or rods.  5) Device according to claim 4 characterized in that the roller or rollers (3) can be driven in a forward or return movement by cycle.  6) Device according to any one of the preceding claims, characterized in that the composter (6) is driven by a given movement either by jack (7), electromagnet or motor.  7) Device according to claim 6 characterized in that the composter (6) is guided by pins (8) and ball bushings or by cylinder rod (7) anti-rotation.