PT84341B - REGISTER REPLACEMENT DEVICE FOR CONTINUOUS BAND PRINTING MACHINES - Google Patents

Abstract

The device, for use in the textile industry for example, consists of a movable band above the continuous band being printed. The gripper is assisted by a feeler with which are associated sensors which determine the stopping of the band driving motor. The gripper is situated in a carriage which can be moved along a guide parallel with the continuous band and is equipped with pneumatic cylinders for opening and closing the gripper, so that control of the positioning or forward movement is achieved.

Description

DISTRIBUTION OF RFFCSI ^ ÃO REGISTRATION FARA l./QUINAS DO ESTAlv.FAR Et. BAN OF CONTINUOUS PEAR CUE

CONuTRLÍOC10; · AND I..ECANICAS FANLCN,

S.A.

intends to obtain privilege of invention in Fortugal summary

The invention relates to a registration reset device for continuous band stamping machines comprising a movable band over the continuous band, in which the stamping is carried out, with the clamp aided by a probe to which sensors are associated which determine the stopping the bard drive motor, said clamp being disposed in a carriage movable along a guide parallel to the continuous band, this car is filled with pneumatic cylinders for the opening and closing of the clamp, entirely for fear that control of The repositioning or recording step takes place, in addition to the stamping part, on the conveyor band.

The present invention is applicable, for example in the textile industry.

65,820

Ref: 86 = 2252

-2M DESCRIPTIVE COFFEE

The present invention relates to a continuous registration device for continuous printing of continuous webs, which has been designed and structured in order to provide an optimum degree of functionality and efficiency in the printing process.

As it is known, the printing with serigraphic inks is carried out through a silk mold, over the nual, with a scraper, the ink is extended and, through the silk, the screen located below.

There are two fundamental types of stamping machines: linear and circular and, in turn, within linear maauinas, there are also two types - the movable mold and the movable screen.

In the movable mold maauinas, the 'el8 neça is stopped and the mold, with the collaboration of a moving car, moves over the piece of canvas, positioning itself with a constant step, making the replacement ie stopping and printing at distances sawing igua i s.

In movable screen piece machines, the screen is the one that moves under the mold, stopping under it to receive stamping, with several molds, one after the other, separated from each other at the correct replacement distance ”Or stamping step, it is possible to print successively different colors, but for that, it is an essential condition that the step or replacement remains constant, with a minimum precision of plus / minus 7 hundred and a half, given that, otherwise, the successive prints are not recorded and the printed motif does not appear clear.

As has been said, the replacement or immersion step then has a very specific precision, which must always be maintained.

electronic control of the motor which produces the advance of the continuous web over the one available to the screen to be printed, proved to be inadequate due to the fact that both the continuous web and the printing screen 8 are not dimensionally stable ·

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-3Lim mechanical control, per rotary counter, also rpc is edenuated, ήpdc bare the mechanical tolerances are greater than those required for registration, which, added to the coefficient of instability ditensicrr · ¹ , easily exceeds raises or less 6c wax t és i but s.

The device of the invention proposes to solve this problem with complete satisfaction, thanks to the control of the resection which passes the registration to be carried out together on the tape and the part to be printed.

For this reason, and more concretely, the device is characterized by the fact that it incorporates a clamp that can be moved over the base of the continuous in which the stamping is carried out., Clamp that is properly guided parallel to the band, including a probe, in the course of which the existence of sensors to be determined has been predicted, and the operation of the engine which drives the tape.

The aforementioned forceps is equipped with retention means, thus, cutter ccr.c? limiting means of your route.

And more specifically, the sliding clamp is formed by a carriage moving on a guide, parallel to the continuous web and included in an imaginary plane perpendicular to the web, a car equipped with rolling means properly adjusted to the guide.

the car, if you are inside a channel inside which the continuous bard moves, incorporating said channel, in one of its side flaps, a pair of pneumatic cylinders, whose excitation causes the continuous band to grasp and its solidarity with the car , so that the latter is dragged by the fi. ta, when this failure is driven by the engine and the aforementioned cylinders are activated.

Returning again to the aforementioned sensors, one of them consists of a proximity detector, whose activation determines a reduction in the forward speed of the motor that drives the band and the other consists of a stop detector for that motor; the third sensor is a limit switch, with safety stop functions.

These sensors are located in a variable register or replacement stop, which includes one. ori65.82C

1-tef: 86 = 2252 ficica through the penetrates with the probe of the mobile car.

The return of the mobile car, once the band is released, a pre-pneumatic cylinder will be used, the rod of which stops when the car reaches, in its trajectory, a limit switch.

With the content of the previously exposed, the stamping register reset passage is determined by the useful path of the carriage between the aforementioned limit switch and the sensor or ^? stop etectcr for that car.

.Like this. and in accordance with the invention, the renegotiation or registration pass takes place, in addition to the part to be printed, on the conveyor tape and according to the means that have already been described above.

it is rare to carry out the description that is being carried out, and in order to help a better understanding of the characteristics of the invention, a single sheet of drawings is attached to the present specification, with a single sheet of drawings illustrative and non-limiting, and in its only figure, a partial perspective view of a register replacement device for continuous band printing machines made in accordance with the object of the present invention, in which the continuous band appears. cropped to clearly show the device’s mechanisms.

It can be seen in this figure how the device used is made from a carriage 1, movable on one of the edges of the continuous band 2, how will it collaborate with a parallel guide 8? cited horde of the band and included in an imaginary plane perpendicular to the latter, including the cited car the rolling means 9, through which it is properly adjusted to the upper and lower edges ⁷ of said guide 8.

Car 1 is lower than one for one. touch probe 5, in which the car 1 travels, the provision of the 4-5-6 sensor group, which determines the stopping of the motor operating on the ribbon, was provided.

Accurately, the action of probe 3 on the sensor

4, cue consists of a proximity detector, causes a reduction

65.

F.ef: 56 = 2252

-5ng breakdown speed of the engine ore drives and bard, while the sensor 5, cue consists of a stop detector and preferably one. magnetic sector, causes the engine to stop? bard.

Between the proximity detector 4 and the stop detector 5, it is possible to place a third detector determining a second reduction in the web advance speed, while the sensor 6, located beyond the stop detector 5, constitutes a end of course with safety stop functions.

All of these sensors are installed in the variable registration stop 14, in which there is a lower orifice 15 in which the touch probe 3 of the car is attached.

There is a complementary m.odc with carriage 1 including a pair of parallel flaps 11 and 12, which determine a channel oriented laterally in relation to the direction of the continuous web 2, the channel through which the corresponding edge of the web runs, constituting the aforementioned channel a drag clamp with the collaboration of a pair of pneumatic cylinders 13 »installed in the car 1, and whose rods access the interior of the mentioned channel causing the grab of the continuous band 2 against the flap 11, thus being the ban of the continuous united to the car.

u carriage return 1, once the continuous web 2 is released by retracting the rods of the cylinders 13, it is carried out with. the operation of a pneumatic cylinder 16, whose rod 17 is also attached to the carriage 1, the transverse flap 1C in the latter, visible in the figure, and the pneumatic cylinders 13 being located on both sides, stopping of the pneumatic cylinder 16 and, consequently, that of the trolley 1, when the latter falls on the end of the curse 18 provided for in a return stop 19 ”in an adjustable position, attached to the guide 7 of the carriage.

It can be deduced from the foregoing that the stamping register reset passage is determined by the useful path of the carriage between the microswitch 18 of the return stop and the stop detector. 5, this passage being adjustable in amplitude, since the positions of both the variable register stop 14 and the zero stop stop 19 are adjustable ·

It is not considered necessary to extend this des

65,920

Ref: 8 ^ = 2252

-6 description so that any expert in the field understands the scope of the invention and the advantages that derive from it.

Claims (8)

1- - Record replacement device for continuous band stamping machines characterized by being made up of a detachable clamp, by the band where it is printed, in which the clamp is guided in parallel and in the same band, and includes a gripper , in the course of which sensors are provided to determine the stop of the engine that drives the web, with the said pinnacle, the means of return and having also provided means limiting its path. 2 ^a - A chord device according to claim 1, rhyming carcass because the clamp is constituted by a trolley guided laterally by the flanks of a guide parallel to the plane of the continuous band parallel to its longitudinal axis and perpendicular to the plane of the aforementioned band, being the car provided with means of rolling adjusted to the guide and incorporating a portion of fixing for the mei. return. 5 ^a - Device according to the preceding claims, characterized in that the carriage has a pair of parallel flaps between which the edge of the continuous band passes and in these flaps are incorporated pneumatic cylinders whose activation produces the grip of the band and its fixing ac · car. ⁸ · 4 Eispositivo according to the preceding claims, characterized in car with 0 being dragged by the band when it moves driven skin engine and grip said pneumatic cylinders bar.da. 5 ^a . - This device according to the arteriographic claims, characterized in that the trolley is equipped with a probe in whose path, in a stop fixed to the trolley guide with the possibility of adjustment, a proximity detector is foreseen, whose activation determines a reduction of the forward speed of the engine or start the delay. 6 ^a - Eispcsitivr according to claims arterio65.S2C Rei: Fú = 22f? res, characterized in that the stop incorporates rurs opening or.de penetrates and the handle of the car, ur. stop detector, preferably consisting of a magnetic sensor, '' which for the ir.ctcr nue activates 2 band. ^A - Device according to the previous claims, characterized in that between the proximity detector and the stop, a third detector may be located which determines a second reduction of the web advance speed. 8 ⁵ - Device according to cot. the artery claims, characterized behind the stop detector being foreseen. (to a limit switch. depending on the safety stop. ^& 9 - Device according to claim Formerly s £ characterized by c carriage return, once released by the band run. a pneumatic cylinder whose base stops when the car slides over an end microswitch. of travel provided in a return stop, in an adjustable position, attached to the carriage guide. lC ^a - ccm chord device. Res arterio claims, characterized in that the passage of the replacement printing nelo be determined working stroke car registration between 0 micrc-interruptcr ^r 0 return abutment and stop detector.