CN115071258A - Double-sided printing machine and pattern aligning method thereof - Google Patents
Double-sided printing machine and pattern aligning method thereof Download PDFInfo
- Publication number
- CN115071258A CN115071258A CN202210704420.2A CN202210704420A CN115071258A CN 115071258 A CN115071258 A CN 115071258A CN 202210704420 A CN202210704420 A CN 202210704420A CN 115071258 A CN115071258 A CN 115071258A
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- worm
- output shaft
- shaft end
- roller
- embossing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
- B41F17/003—Special types of machines for printing textiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/10—Forme cylinders
- B41F13/12—Registering devices
- B41F13/14—Registering devices with means for displacing the cylinders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2217/00—Printing machines of special types or for particular purposes
- B41P2217/10—Printing machines of special types or for particular purposes characterised by their constructional features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2217/00—Printing machines of special types or for particular purposes
- B41P2217/50—Printing presses for particular purposes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Rotary Presses (AREA)
Abstract
The invention relates to the field of printing machines, in particular to a double-sided printing machine, which comprises a synchronous gearbox, a first printing roller, a second printing roller and an adjusting mechanism, wherein the synchronous gearbox comprises a first output shaft end and a second output shaft end, and the first output shaft end is in transmission connection with the first printing roller; the guiding mechanism includes even board, the axle bed, the worm wheel sleeve pipe, a bearing, worm wheel sleeve pipe box is located outside the second output shaft end, and be equipped with the bearing between worm wheel sleeve pipe and the second output shaft end and realize rotatable coupling, even board is located on the second output shaft end and can be together rotatory with the second output shaft end, the axle bed is located even on the board, the worm is located on the axle bed, worm and worm wheel sleeve pipe meshing setting, the worm wheel sleeve pipe is connected with the transmission of second embossing roll, make the worm wheel sleeve pipe rotate around the axis through rotating the worm, with the angle relative position who changes worm wheel sleeve pipe and second output shaft end, and then change the corresponding position of the stamp pattern on the first embossing roll and the stamp pattern of second embossing roll.
Description
Technical Field
The invention relates to the field of printing machines, in particular to a double-sided printing machine and a registration method of the double-sided printing machine.
Background
Most of the current cloth is single-sided printing, the availability ratio of the single-sided printing cloth is low, the same forehead patterns can be printed on the front side and the back side of the cloth only when the utilization ratio is increased, the positions, the shapes, the sizes and the distribution of the front side and the back side of the cloth are required to be completely aligned during double-sided printing, otherwise, the patterns on the two sides are staggered, and the attractive effect of the cloth can be reduced. Along with the development of double-sided printing, to some products that need both sides stamp, need both sides pattern to be unanimous simultaneously, flexible accumulative error can appear at continuous printing in-process in the present double-sided printing, easily causes the problem that the stamp dislocation can't be controlled.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a double-sided printing machine with a pattern aligning function and a pattern aligning method of the double-sided printing machine.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a double-sided printing machine comprises a synchronous gear box, a first printing roller, a second printing roller and an adjusting mechanism, wherein the synchronous gear box comprises a first output shaft end and a second output shaft end, the first output shaft end and the second output shaft end synchronously rotate, and the first output shaft end is in transmission connection with the first printing roller;
the adjusting mechanism comprises a connecting plate, an axle seat, a worm gear sleeve and a bearing, the worm gear sleeve is sleeved outside the second output shaft end, the bearing is arranged between the worm gear sleeve and the second output shaft end to realize rotatable connection, the connecting plate is arranged on the second output shaft end and can rotate together with the second output shaft end, the axle seat is arranged on the connecting plate, the worm is arranged on the axle seat, the worm is meshed with the worm gear sleeve, the worm gear sleeve is in transmission connection with the second embossing roller, the worm gear sleeve is rotated around the axis by rotating the worm to change the angle relative position of the worm gear sleeve and the second output shaft end, and then the corresponding position of the embossing pattern on the first embossing roller and the embossing pattern on the second embossing roller is changed.
Furthermore, a positioning hole is formed in the shaft seat, a positioning bolt is arranged in the positioning hole, and the worm is abutted to the worm through a locking bolt so as to position the worm.
The worm-gear type worm gear is characterized by further comprising a scale wheel, wherein the scale wheel is arranged at one end of the worm and is arranged on one side of the shaft seat, the scale wheel can rotate along with the worm, and scale numbers are arranged on the scale wheel.
Furthermore, the worm gear mechanism further comprises a hand wheel, wherein the hand wheel is arranged at one end of the scale wheel and can drive the worm to rotate.
Furthermore, the shaft seats are two, the scale wheels are two, the hand wheels are two, the worm penetrates through the two shaft seats, the two scale wheels are arranged at two ends of the worm, the two hand wheels are respectively arranged on the two scale wheels, and the directions of scale numbers on the two scale wheels are opposite.
The first output shaft end is in transmission connection with the first embossing roller through a universal transmission shaft, and the worm gear sleeve is in transmission connection with the universal transmission shaft and is in transmission connection with the second embossing roller.
Further, still include horizontal adjustment mechanism, the last pars contractilis that is equipped with of universal drive shaft, horizontal adjustment structure includes screw rod, fixed cover, stopper, second stamp roller axle is located to fixed cover and is served, on the screw rod was located to stopper upper end cover, the stopper lower extreme inlays and locates fixed sheathe in, rotates the screw rod and drives stopper lateral shifting, drives second stamp roller and relies on pars contractilis along axis direction lateral shifting, and then changes the relative position of second stamp roller and first stamp roller.
Further, the transfer printing device further comprises a transfer printing roller, wherein the transfer printing roller is arranged between the first printing roller and the second printing roller.
Furthermore, a connecting boss protruding from one side of the worm gear sleeve is arranged, and the universal transmission shaft is in transmission connection with the connecting boss.
A registration method of a double-sided printing machine comprises the steps that a first output shaft end and a second output shaft end run synchronously, a first output end is in transmission connection with a first printing roller, and the second output shaft end is in transmission connection with a second printing roller; the method is characterized in that: comprises that
The circumferential direction adjusting method comprises the following steps:
A1. in a shutdown state, the first output shaft end and the second output shaft end are kept stationary;
A2. loosening the positioning bolt, rotating the worm to make the worm rotate around the axis of the worm, and rotating the worm to drive the worm gear sleeve to rotate around the axis due to the meshing arrangement of the worm and the worm gear sleeve, changing the relative angle position of the worm gear sleeve and the second output shaft end, simultaneously rotating the second embossing roller around the axis, adjusting the second embossing roller to the state that the circumferential position of the second embossing roller is corresponding to the circumferential position of the embossing pattern on the first embossing roller,
A3. locking the positioning bolt;
the transverse adjustment method comprises the following steps:
B1. in a shutdown state, the first output shaft end and the second output shaft end are kept stationary, and the adjusting mechanism is in a locking state;
B2. rotate the screw rod, because the stopper on the screw rod inlays each other with the fixed cover of second embossing roll axle head and establishes to because universal drive shaft's pars contractilis can freely stretch out and draw back, make the screw rod rotate and to drive stopper lateral shifting and then drive the second embossing roll and make a round trip lateral shifting in the flexible within range of pars contractilis, adjust to the second embossing roll and be in corresponding state at the lateral position with the stamp pattern on the first embossing roll.
As can be seen from the above description of the present invention, compared with the prior art, the double-sided printing machine and the pattern matching method of the double-sided printing machine provided by the present invention have the advantages that the synchronous gear box is arranged to synchronously drive the first printing roller and the second printing roller to synchronously rotate, so that the fabric is printed on both sides between the first printing roller and the second printing roller;
the adjusting mechanism is arranged to enable the worm to be adjusted and rotated to drive the worm gear sleeve to rotate through the meshing arrangement of the worm and the worm gear sleeve, so that the angle relative position of the worm gear sleeve and the second output shaft end is changed, and further the worm gear sleeve rotates to drive the second printing roller to rotate, so that the printed patterns of the second printing roller and the printed patterns of the first printing roller are in corresponding positions;
the positioning hole and the positioning bolt are arranged and used for being locked in the positioning hole through the positioning bolt and abutting against the worm to position the worm, so that the worm and the worm wheel sleeve can be in a locking state;
the arrangement of the scale wheels has the effect of accurately adjusting the angle of the worm through the scale numbers, the scale wheels are arranged on the two sides of the worm, the scale numbers on the two sides face oppositely, and the adjusting mechanism enables the worm to rotate along with the second output shaft end, so that the worm can have one side which is convenient for observing the scale numbers when the worm stays at any angle;
set up universal drive shaft's effect and lie in making the output shaft end pass through universal drive shaft and be connected with the embossing roll transmission for the regulation performance of embossing roll is better, and through setting up horizontal regulation structure and universal drive shaft cooperation, because of the flexible portion that has scalable setting on the universal drive shaft, make horizontal adjustment mechanism can drive second embossing roll lateral shifting, in order to adjust the corresponding position of the stamp pattern of second embossing roll and first embossing roll on horizontal direction.
Drawings
FIG. 1 is a schematic structural diagram of a double-sided printing machine of the present invention.
FIG. 2 is a schematic view of a partial cross-sectional structure of a double-sided printing machine according to the present invention.
FIG. 3 is an enlarged view of the structure at A in the figure according to the present invention.
FIG. 4 is an enlarged view of the structure at B in the figure according to the present invention.
FIG. 5 is a schematic view of an adjusting mechanism according to the present invention.
FIG. 6 is a schematic side view of the adjusting mechanism of the present invention.
FIG. 7 is a schematic view of a half-section structure of an adjusting mechanism of the present invention.
FIG. 8 is a schematic diagram of the adjustment mechanism of the present invention in a separated configuration.
The labels in the figure correspond to the following: 1. the automatic printing device comprises a synchronous gearbox 11, a first output shaft end 12, a second output shaft end 13, a third output shaft end 2, a first printing roller 3, a second printing roller 4, a transfer roller 5, an adjusting mechanism 51, a connecting plate 52, a shaft seat 521, a positioning hole 522, a positioning bolt 53, a worm, a dial wheel 531, a dial wheel 532, a turbine sleeve 54, a turbine sleeve 541, a connecting boss 55, a bearing 6, a universal transmission shaft 61, a telescopic part 7, a transverse adjusting mechanism 71, a screw 72, a fixed sleeve 73 and a limiting block.
Detailed Description
The invention is further described below by means of specific embodiments.
Referring to fig. 1 to 8, a double-sided printing machine comprises a synchronous gear box 1, a first printing roller 2, a second printing roller 3 and an adjusting mechanism 5.
Synchronous gear box 1 includes first output axle head 11, second output axle head 12, first output axle head 11 rotates with second output axle head 12 is synchronous, first output axle head 11 is connected with the transmission of first embossing roll 2 through universal drive shaft 6, second output axle head 12 is connected with the transmission of second embossing roll 3 through universal drive shaft 6.
The adjusting mechanism 5 comprises a connecting plate 51, a shaft seat 52, a worm 53, a worm gear sleeve 54 and a bearing 55, the worm gear sleeve 54 is sleeved outside the second output shaft end 12, the bearing 55 is arranged between the worm gear sleeve 54 and the second output shaft end 12 to realize rotatable connection, the connecting plate 51 is arranged on the second output shaft end 12 and can rotate together with the second output shaft end 12, the shaft seat 52 is arranged on the connecting plate 51, the worm 53 is arranged on the shaft seat 52, the worm 53 is meshed with the worm gear sleeve 54, the worm gear sleeve 54 is in transmission connection with the second printing roller 3, the worm 53 is rotated to enable the worm gear sleeve 54 to rotate around the shaft axis, so that the relative angle position of the worm gear sleeve 54 and the second output shaft end 12 is changed, and further the corresponding position of the printed patterns on the first printing roller 2 and the printed patterns on the second printing roller 3 are changed.
The shaft seat 52 is provided with a positioning hole 521, a positioning bolt 522 is arranged in the positioning hole 521, and the worm 53 is abutted to the worm 53 through a locking bolt so as to position the worm 53, so that the worm 53 and the worm wheel sleeve 54 can be in a locking state, and the problem that the relative angle position of the worm wheel sleeve 54 and the second output shaft end 12 can be changed because the worm 53 can continuously rotate due to the rotation of the second output shaft end 12 is avoided, and the adjustment effect is influenced.
The scale wheel 531 is arranged at one end of the worm 53 and at one side of the shaft seat 52, the scale wheel 531 can rotate along with the worm 53, and scale numbers are arranged on the scale wheel 531; the hand wheel 532 is arranged at one end of the scale wheel 531, and the hand wheel 532 can drive the worm 53 to rotate; the number of the shaft seats 52 is two, the number of the scale wheels 531 is two, the number of the hand wheels 532 is two, the worm 53 penetrates through the two shaft seats 52, the two scale wheels 531 are arranged at two ends of the worm 53, the two hand wheels 532 are respectively arranged on the two scale wheels 531, and the scale numbers on the two scale wheels 531 face to opposite directions; the arrangement of the scale wheel 531 has the advantages that the worm 53 is precisely angle-adjusted through the scale numbers, the scale wheels 531 are arranged on two sides of the worm 53, the scale numbers on the two sides face oppositely, and the adjusting mechanism 5 enables the worm 53 to rotate along with the second output shaft end 12, so that the worm 53 can have one side to observe the scale numbers conveniently under the condition of any angle.
The first output shaft end 11 is in transmission connection with the first embossing roll 2 through a universal transmission shaft 6, the worm gear sleeve 54 is in transmission connection with the universal transmission shaft 6 and is in transmission connection with the second embossing roll 3, a connecting boss 541 which is convexly arranged is arranged on one side of the worm gear sleeve 54, and the universal transmission shaft 6 is in transmission connection with the connecting boss 541; the universal transmission shaft 6 is of a structure that the middle part is provided with a telescopic part 61 which can be telescopically arranged and the two ends are provided with universal joints; horizontal adjustment mechanism 7 includes screw rod 71, fixed cover 72, stopper 73, fixed cover 72 is located on the 3 axle heads of second embossing roll, on stopper 73 upper end cover was located screw rod 71, stopper 73 lower extreme inlays and locates fixed cover 72, rotates screw rod 71 and drives stopper 73 lateral shifting, drives second embossing roll 3 and relies on pars contractilis 61 along axis direction lateral shifting, and then changes the relative position of second embossing roll 3 and first embossing roll 2 to change the relative position of the stamp pattern of second embossing roll 3 and first embossing roll 2 on the lateral direction.
And the transfer roller 4 is arranged between the first printing roller 2 and the second printing roller 3, the transfer roller 4 is similarly arranged on the transfer roller 4 which is connected with the universal transmission shaft 6 through the third output shaft end 13 and can be in transmission connection, and the transfer printing is carried out through the transfer roller 4, so that the printing pattern can be clearer.
The working principle of the double-sided printing machine is as follows:
under the normal working condition, the first output shaft end 11 and the second output shaft end 12 run synchronously, the first output shaft end 11 is in transmission connection with the first embossing roll 2 through a universal transmission shaft 6, the second output shaft end 12 is in transmission connection with the second embossing roll 3 through the universal transmission shaft 6, an adjusting structure is arranged on the second output shaft end 12 and can rotate along with the second output shaft end 12, and double-sided printing is completed on cloth between the first embossing roll 2 and the second embossing roll 3;
because the printed patterns of the first printing roller 2 and the second printing roller 3 are misplaced in different directions and have errors after long-term use, the following two adjusting methods are provided,
the circumferential direction adjusting method comprises the following steps:
A1. in a shutdown state, the first output shaft end 11 and the second output shaft end 12 are kept stationary;
A2. loosening the positioning bolt 522, rotating the hand wheel 532 to drive the worm 53 to rotate so that the worm 53 rotates around the axis of the worm 53, and because the worm 53 is meshed with the worm wheel sleeve 54, the worm 53 rotates to drive the worm wheel sleeve 54 to rotate around the axis, so that the angle relative position of the worm wheel sleeve 54 and the second output shaft end 12 is changed, and meanwhile, the second printing roller 3 rotates around the axis and is adjusted to be in a state that the printing patterns on the second printing roller 3 and the first printing roller 2 are in a corresponding state in the circumferential direction;
A3. the positioning bolt 522 is locked, so that the worm 53 and the worm wheel sleeve 54 can be in a locking state, and the worm 53 is prevented from rotating again, so that the adjustment effect is influenced;
the transverse adjustment method comprises the following steps:
B1. in a shutdown state, the first output shaft end 11 and the second output shaft end 12 are kept stationary, and the adjusting mechanism 5 is in a locking state;
B2. the screw 71 is rotated, the limit block 73 on the screw 71 and the fixed sleeve 72 at the shaft end of the second printing roll 3 are embedded with each other, and the telescopic part 61 of the universal transmission shaft 6 can be freely stretched, so that the screw 71 is rotated to drive the limit block 73 to transversely move so as to drive the second printing roll 3 to transversely move back and forth in the telescopic range of the telescopic part 61, and the patterns on the second printing roll 3 and the first printing roll 2 are adjusted to be in a corresponding state at the transverse position.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention using this concept shall fall within the scope of the present invention.
Claims (10)
1. The utility model provides a two-sided calico printing machine which characterized in that: the automatic embossing device comprises a synchronous gearbox, a first embossing roller, a second embossing roller and an adjusting mechanism, wherein the synchronous gearbox comprises a first output shaft end and a second output shaft end, the first output shaft end and the second output shaft end synchronously rotate, and the first output shaft end is in transmission connection with the first embossing roller;
the adjusting mechanism comprises a connecting plate, an axle seat, a worm gear sleeve and a bearing, the worm gear sleeve is sleeved outside the second output shaft end, the bearing is arranged between the worm gear sleeve and the second output shaft end to realize rotatable connection, the connecting plate is arranged on the second output shaft end and can rotate together with the second output shaft end, the axle seat is arranged on the connecting plate, the worm is arranged on the axle seat, the worm is meshed with the worm gear sleeve, the worm gear sleeve is in transmission connection with the second embossing roller, the worm gear sleeve is rotated around the axis by rotating the worm to change the angle relative position of the worm gear sleeve and the second output shaft end, and then the corresponding position of the embossing pattern on the first embossing roller and the embossing pattern on the second embossing roller is changed.
2. A double-sided printing machine according to claim 1, characterized in that: the shaft seat is provided with a positioning hole, a positioning bolt is arranged in the positioning hole, and the worm is abutted to the worm through a locking bolt so as to position the worm.
3. A double-sided printing machine according to claim 1, characterized in that: the scale wheel is arranged at one end of the worm and is arranged on one side of the shaft seat, the scale wheel can rotate along with the worm, and scale numbers are arranged on the scale wheel.
4. A double-sided printing machine according to claim 3, characterized in that: still include the hand wheel, scale wheel one end is located to the hand wheel, the hand wheel can drive the worm and rotate.
5. A double-sided printing machine according to claim 4, characterized in that: the two shaft seats are provided, the two scale wheels are provided, the two hand wheels are provided, the worm penetrates through the two shaft seats, the two scale wheels are arranged at two ends of the worm, the two hand wheels are respectively arranged on the two scale wheels, and the directions of scale numbers on the two scale wheels are opposite.
6. A double-sided printing machine according to claim 1, characterized in that: the first output shaft end is in transmission connection with the first embossing roll through a universal transmission shaft, and the worm gear sleeve is in transmission connection with the universal transmission shaft and is in transmission connection with the second embossing roll.
7. A perfecting printing machine according to claim 6, characterized in that: still include horizontal adjustment mechanism, the last pars contractilis that is equipped with of universal drive shaft, horizontal adjustment structure includes screw rod, fixed cover, stopper, second stamp roller axle is located to fixed cover and serves, on the screw rod was located to stopper upper end cover, the stopper lower extreme inlays and locates fixed sheathe in, rotates the screw rod and drives stopper lateral shifting, drives second stamp roller and relies on pars contractilis along axis direction lateral shifting, and then changes the relative position of second stamp roller and first stamp roller.
8. A double-sided printing machine according to claim 1, characterized in that: the transfer printing device further comprises a transfer printing roller, and the transfer printing roller is arranged between the first printing roller and the second printing roller.
9. A double-sided printing machine according to claim 6, characterized in that: one side of the worm gear sleeve is provided with a connecting boss which is convexly arranged, and the universal transmission shaft is in transmission connection with the connecting boss.
10. A registration method of a double-sided printing machine comprises the steps that a first output shaft end and a second output shaft end run synchronously, a first output end is in transmission connection with a first printing roller, and the second output shaft end is in transmission connection with a second printing roller; the method is characterized in that: comprises that
The circumferential direction adjusting method comprises the following steps:
A1. in a shutdown state, the first output shaft end and the second output shaft end are kept stationary;
A2. loosening the positioning bolt, rotating the worm to enable the worm to rotate around the axis of the worm, enabling the worm to rotate to drive the worm gear sleeve to rotate around the axis due to the fact that the worm is meshed with the worm gear sleeve, changing the relative angle position of the worm gear sleeve and the second output shaft end, meanwhile, enabling the second embossing roller to rotate around the axis, and adjusting the second embossing roller to be in a state that the circumferential position of the second embossing roller corresponds to the circumferential position of the embossing pattern on the first embossing roller;
A3. locking the positioning bolt;
the transverse adjustment method comprises the following steps:
B1. in a shutdown state, the first output shaft end and the second output shaft end are kept unknown, and the adjusting mechanism is in a locking state;
B2. rotate the screw rod, because the stopper on the screw rod inlays each other with the fixed cover of second embossing roll axle head and establishes to because universal drive shaft's pars contractilis can freely stretch out and draw back, make the screw rod rotate and to drive stopper lateral shifting and then drive the second embossing roll and make a round trip lateral shifting in the flexible within range of pars contractilis, adjust to the second embossing roll and be in corresponding state at the lateral position with the stamp pattern on the first embossing roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210704420.2A CN115071258A (en) | 2022-06-21 | 2022-06-21 | Double-sided printing machine and pattern aligning method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210704420.2A CN115071258A (en) | 2022-06-21 | 2022-06-21 | Double-sided printing machine and pattern aligning method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115071258A true CN115071258A (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210704420.2A Pending CN115071258A (en) | 2022-06-21 | 2022-06-21 | Double-sided printing machine and pattern aligning method thereof |
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| CN (1) | CN115071258A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117141130A (en) * | 2023-08-31 | 2023-12-01 | 江苏凯瑞家纺科技有限公司 | Efficient environment-friendly stable cloth printing machine |
-
2022
- 2022-06-21 CN CN202210704420.2A patent/CN115071258A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117141130A (en) * | 2023-08-31 | 2023-12-01 | 江苏凯瑞家纺科技有限公司 | Efficient environment-friendly stable cloth printing machine |
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