DE2130175A1 - Rotation multiplier for printing a printing form made of paper, plastic or the like that is attached to a printing drum. - Google Patents

Description

Gerhard Ritzerfeld, 1 Berlin 33 »Schorlemer Allee 14

" Rotary duplicator for printing a printing form made of paper, plastic or the like, which is attached to a bridging drum "

The invention relates to a notation duplicator for printing a printing form made of paper, plastic or the like, which is attached to a printing drum and which is provided with a mirror image that reacts to heat, with a ₉ acting in the infrared range, seen in the direction of rotation of the printing drum, behind the printing line Heat radiator directed towards the printing forme and a layer transfer belt, which is pressed against the printing drum by means of one or more pressure rollers.

In particular, the invention relates to rotary _{multipliers for printing printing forms 9,} the lines of which run in the circumferential direction of the printing drum.

Rotary multipliers of this type are for the spirit transfer printing process known. However, these methods have the disadvantage that color sheets with highly water-soluble dyes, e.g. triphenylmethane dyes, which lead to the unintentional release of dye to the hands etc. tend,

The invention is based on the object of using rotary multipliers in a line or section To enable printing by thermographic means.

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BATH

The object is achieved according to the invention in that a second heat source in front of the print line, ζ, Β. Infrared heater ο the like., Is arranged, the effect of which on the image areas of the printing form or the printing drum The controllable covers or shields assigned to the lines or sections of the printing form are lifted, wherein the covers or shields can optionally be brought between the heat source and the printing form.

The covers are expediently made of heat-reflecting material Material and can be brought into and out of the covering position mechanically or electromechanically.

An expedient embodiment of the subject matter of the invention is that the printing drum has two mutually adjustable clamping devices for the printing forms and given = if it has heat-insulating pads and by adjusting the clamping devices, the ones intended for the impression Parts are placed side by side and the effect of the. Spotlight on the parts intended to be imprinted, e.g. the head and one or more lines, remains limited, while the remaining printing form parts are excluded from the radiation effect will.

It is particularly advantageous to transfer the layer from the layer of transfer tape to the image areas of the printing form-M§t% ls;,; des first heat radiator, preferably infrared radiator, also the lines or abscimenter of the printing form (s) Assigned, preferably wäraereflektierande

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Provide cover or shielding devices, which are optionally or together with the corresponding covers of the second heat source between radiator and printing drum _{9 to} exclude lines or sections of the printing form from the coating by means of the layer transfer tape.

According to a modified embodiment of the subject matter of the invention, the layer is transferred to the image areas of the printing form uses two layer transfer belts arranged pivotably next to one another, one of which optionally one or both of them can be pressed against the printing drum when the heat emitter, e.g. infrared emitter, is actuated.

In the drawings, the subject matter of the invention is shown by way of example Execution shown. It shows:

Fig. 1 is a side view of an eotation manifold

with the control for the shields of the radiators;

Fig. 2 is a plan view of the adjustment mechanisms for the shields ι

3 shows the top view of the printing cylinder and the pivot mechanism of the two juxtaposed layer transfer belts of a rotary duplicator j

Fig. 4- the side view according to Fig. 3

BATH ORIGINAL

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1 shows a printing drum 1 with a heat-repellent base 2 "which is or is fixedly arranged on the printing drum 1 is clamped and a by means of a clamping device 3 attached to the printing drum 1 mirror writing printing form with heat-reactive image areas 4a facing away from the printing drum. Should the mirror writing print form 4, hereinafter referred to as printing form, individual parts of rruck are excluded, it must be prevented that the ropes to be excluded from! Printing forme 4 through the

"Radiators 7 and 8 irradiate dye from the ribbon 6 in the Transfer layer transfer line C-D onto the image areas 4a and when the pressure roller 5 is pressed, an impression is made on the sheet of paper in the printing line A-B. In order to prevent the printing form 4 from being irradiated by the heat radiator 7, there is a cover device in its area 11, 12, 17 and 18 are provided. The segment-shaped cover is rotatably mounted about the axis 12 and is when the electromagnet 17 is excited by means of the armature 18 in front of the

h Radiant heater 7 swiveled. A cover device is also provided for the heat radiator 8 ₉ which heats the image areas 4a before the impression is made.

The printing forme 4 is divided into lines or sections (FIG. 2). Each of the sections is a slide 9 with a strip-shaped cover 9a as well as a cover segment 11 assigned. The cover strip 9a is slidably guided in a guide 10.

ORIGINAL BATHROOM.

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A hand lever 14 pivotable about the axis 13, of which in Fig. 2 four lines 1 to 4, which are in the circumferential direction the printing drum 1 are assigned, moves the slide 9 with the cover 9a into the with its pin 14a The dot-dash position between the heat radiator δ and the printing forme 4 shown in FIG. 1. A dead center spring 15 holds the hand lever 14 in its respective end positions. If the hand lever 14 is drawn in its dash-dotted lines Pivoted position, it closes the contact 16 and energizes the electromagnet I7. The armature 18 pivots Cover 11 also in the position shown by dash-dotted lines between the heat radiator 7 and the printing forme 4 and thus prevents the heat transfer to the image areas 4a. To delete the differently set covers 9 and 11 the extinguishing lever 19 is used on whose axis 20 the eccentric roller 21 is attached. The eccentric roller 21 strokes the entire hand lever 14 * A pivoting movement of the extinguishing lever 19 in the direction of arrow E leaves the Press the eccentric roller 21 on the hand lever 14, which, under the action of the dead center spring 15, moves against the stop 22 be pressed. The tension spring 23 pulls the extinguishing lever 19 against the stop 24 after the extinguishing process has ended Starting position back.

FIGS. 3 and 4 show a further embodiment of the subject matter of the invention, in which the line or section show imprints lying next to each other · ribbons 39-, 4Ί be used·

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P; se. * fi
In the plates 25 and 26 of the ribbon unit, the axle 27 ', the axles of the gate rollers 28 and 29 and the winding rollers 30 and 31 are mounted. Two eccentric cores 32 and 33 are attached to the axis 27, the length of which corresponds to the width of the dye bath Bring the direction of the arrow F into the position shown in phantom in FIG. 4. The saber swings the eccentric core 32 with its clump 38 against the printing drum 1 "in order to transfer the color composition of the ink ribbon 39 to the printing forme 4 (FIG. 1). _S are Independently, at other times of the eccentric core 33 with its running on the roller element 40 ink ribbon 41 against the printing drum 1 and the printing form pivoted so that another cable d © r retained on the Ecucktrommel 1 printing form is coated.

SAD ORiQ (NAL

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Claims (5)

Applicant: Gerhard Bitzer4eTrfr '' ^. 1 Berlin 33 * f Schorlemer Allee 14 patent claims: 1. Rotary vicilf al tiger zxm. Impression of a printing form made of paper, plastic or the like, which is attached to a printing tray and which is provided with a mirror image that reacts to heat, with an _{8 oppositely arranged in the infrared range behind the printing drum as seen in the direction of the printing drum} ) j? uc? iform directed l'ai ^ aießtrshler aowie a layer transfer belt ;, ^ # lcl38s is pressed by one or more Andruckwalren against cite Erucktroamiel, gekenozeichaet characterized _s that before the JDrucklinie a second heat source, eB "IhfrarotEtrahler or the like. _{s is} arranged, the effect of which on the image areas of the printing form or the printing drum is canceled by the controllable covers or shields assigned to the lines or sections of the printing form, the covers or shields optionally being able to be brought between the heat source and the printing form. 2. Rotary duplicator according to claim 1 _δ, characterized in that the covers are made of heat-reflecting material and can be brought into and out of the covering position mechanically or electromechanically. BATH ORIGINAL -2- 209853/0315 3. Rotary duplicator according to claims 1 and 2, characterized in that the printing drum has two mutually adjustable clamping devices for the printing forms and, if necessary, has their heat-insulating pads and, by adjusting the clamping devices, that are used for the impression certain parts are arranged next to each other and the effect of the radiator on the parts intended for the impression, e.g. head and one or more lines, remains limited, while the other printing form parts are affected by the jet be excluded. 4. Eotation multiplier according to claims 1 and 3 » characterized in that for transferring the layer from the layer transfer tape to the image areas of the printing form by means of the first heat radiator, preferably infrared radiator, likewise the lines or sections Preferably heat-reflecting cover or shielding devices assigned to the printing form (s) are provided, which optionally or together with the corresponding covers of the second heat source between radiator and Printing drum are brought to lines or sections of the printing form from the coating by means of the layer transfer belt to exclude. -3-. 209853/0315 3. 5. Eotation duplicator for printing one on one print— drum-mounted printing form made of paper, plastic ο »the like ·, the sit is provided with a mirror image that reacts to heat, with a rear view in the direction of rotation of the printing drum Heat radiators arranged in the infrared range and directed against the printing form, as well as a layer transfer belt, which is pressed against the printing drum by means of one or more pressure rollers, characterized in that two adjacent to each other for transferring the layer to the image parts of the printing form Pivotably arranged layer transfer belts can be used, one or both of which are optionally pressed against the printing drum upon actuation of the heat extinguisher, e.g. infrared radiator. BADORiGtNAL 2ÖS853 / Ö3t5 AO Blank page