DE2829219A1 - DRIVE DEVICE, IN PARTICULAR FOR COLOR PRINTING APPARATUS FOR INTERVAL COLORING A TRAIL OF PARALLEL FAEDS - Google Patents

Description

Edgar Pickering (Blackburn) Limited in Blackburn, England

Drive device, in particular for color printing apparatus for the interval dyeing of a web of parallel threads

It is known in the manufacture of so-called interval dyed Threading threads or yarns a web of parallel thread lengths horizontally through a series of printheads, each of which consists of a pair of interacting rollers which, according to a printing program, color liquids Apply different colors to specific, successive lengths of the threads.

For example, if the threads to be dyed are for use in a tufting machine, there may be six Print heads are needed, each of which applies a different color to the filaments and which are spaced about 1 to 1.5 m apart. It is necessary for one Synchronization of the printheads to ensure that each printhead has its color on the correct spot Applies threads. So far this has been done by adjusting the chain drives to the individual print heads. These Measure has proven to be difficult and unsatisfactory in practice.

In order to remedy these deficiencies and difficulties, the present one provides Invention therefore a drive device, which is characterized in that it has an input shaft and several Having output shafts and that between the input shaft

- 2 -

8DÖ884 / 08U

le and each output shaft an adjustment mechanism for generating a phase adjustment is provided between each output shaft and the input shaft, which is composed of one drive shaft coupled to the input shaft, one on the drive shaft non-rotatably and axially displaceably arranged Worm, which meshes with a worm wheel on the output shaft, made up of a pair of screw-threaded sleeves, which are axially adjustable by turning in fixed nuts and are arranged at opposite ends of the worm are, and from external gears on the sleeves, which mesh with gears of a common control shaft, the perallel is arranged to the drive shaft and by turning the sleeves and the worm axially on the drive shaft.

In the drawing is an embodiment of the invention Drive device shown · It show

FIG. 1 is a schematic view of two successive print heads of a printing unit, each of which has one has its own setting unit}

FIG. 2 is a view of an adjusting unit in longitudinal section; FIG. 3 shows a section along the line III-III in FIG.

When dyeing threads at intervals, a web of parallel threads is created 10 (Figure 1) passed horizontally through a printing unit containing a series of print heads 11, each of which fed with a colored liquid in a different color and the threads are printed in a pattern determined by program control. Each printhead consists of an upper roller 12 and a lower roller 13, the surface of which when rotating

80988A / 03U

the roller moves through a paint liquid contained in a trough 14. The upper roller 12 has a smooth surface, the lower roller 13 carries pressure pads or pressure stamps 15 'which are pushed out of the roller 13 in a certain selection are in a printing position to dye the threads according to the desired pattern.

The synchronous drive of the individual print heads is carried out by the drive device according to the invention. This drive device contains an input shaft 18 that is common to all print heads, of which via individual chain drives 19 and individual Adjustment mechanisms 20 a plurality of output shafts 16 are driven. By means of the adjustment mechanisms 20, if necessary, a phase adjustment between the individual output shafts 16 can be carried out. One output shaft 16 each the lower roller 13 of a print head is driven via a chain drive 17. The output shaft 16 The upper roller 12 of the print head is driven via a chain drive, not shown in detail.

As Figures 2 and 3 show, each includes adjustment mechanisms 20 of the drive device has a drive shaft 21 which is connected to the Input shaft 18 is coupled by a chain drive 19. On the drive shaft 21, a worm 22 is non-rotatable, but axially arranged displaceably. The worm 22 meshes with a worm wheel 23 on the output shaft assigned to this drive shaft 16 is arranged. Axial bearings 24 are arranged between the ends of the worm 22 and sleeves 25, which on their outer

809884/0814

side are provided with a screw thread and in nuts 26 are screwed, which are fixedly arranged on the housing 2 of the adjustment mechanism. Each nut 26 has a gear 27, which meshes with a wider gear 28 of an actuating shaft 29 which runs parallel to the drive shaft 21. the Adjusting shaft 29 can be rotated by remote control via a chain drive engaging a chain wheel 30.

By turning the adjusting shaft 29, one of the two sleeves 25 is screwed into the associated nut 26 and the other The sleeve is unscrewed from the associated nut. As a result, the worm 22 on the drive shaft 21 is out of a normal position axially displaced in one direction or the other. This results in a phase setting between the worm wheel 23 bearing output shaft 16 and the drive shaft 21 and the input shaft 18 causes.

809884/0814

egg soap

Claims (1)

Edgar Pickering (Blackburn) Limited in Blackburn, England Drive device, in particular for color printing apparatus for the interval dyeing of a web of parallel threads Claims f 1 "^ drive device, in particular for color printing apparatus for ^ * - ^ interval dyeing a web of parallel threads, characterized in that the device has an input shaft (18) and several output shafts (16) and that between the input shaft and each output shaft an adjusting mechanism ( 20) is provided for generating a phase adjustment between each output shaft and the input shaft, which is composed of a drive shaft (21) coupled to the input shaft (18), a worm (22) which is non-rotatable and axially displaceable on the drive shaft and which is connected to a Worm wheel (23) meshes with the output shaft (16), from a pair of screw-threaded sleeves (25), which are axially adjustable by turning in fixed nuts (26) and are arranged at opposite ends of the worm, and from external gears ( 27) on the sleeves, which mesh with gears (28) of a common adjusting shaft (29), the par is arranged allele to the drive shaft and moves the sleeves and the worm axially on the drive shaft by rotation. 2β Drive device according to claim 1, characterized in that axial thrust bearings (24) are arranged between the ends of the screw (22) and the sleeves (25), _o 809884/0814 3. Application of the drive device according to claim 1 in a
Rotary color printing machine which has a plurality of roller print heads arranged in series one behind the other for the intermittent dyeing of continuous threads, which are connected to the common input shaft (18) of the drive device for their drive and of which each print head has an adjustment mechanism (20) and an output shaft ( 16) the drive device is driven. 809884/0814