Device for controlling the production quality of a press that produces package blanks from sheets of material

• US 5,705,020 A
• Filed: 06/16/1995
• Issued: 01/06/1998
• Est. Priority Date: 06/17/1994
• Status: Expired due to Term

• Current Assignee: Bobst SA (JBF Finance SA)
• Original Assignee: Bobst SA (JBF Finance SA)
• Inventors: Chiari, Mauro
• Primary Examiner(s): Simmons, David A.
• Assistant Examiner(s): Rivard, Paul M.
• Application Number:
  US08/491,151
• Time in Patent Office: 935 Days
• Field of Search: 156/350, 156/353, 156/356, 156/362, 156/363, 156/364, 156/378, 156/379, 156/510, 156/517, 271/258.01, 271/265.01
• US Class Current: 156/350
• CPC Class Codes: B31B 50/006 Controlling; Regulating; Measuring; Improving safety
• CPC Class Codes: B65H 2220/01 indicating an entity as a function of which control, adjustment or change is performed, i.e. input
• CPC Class Codes: B65H 2220/03 indicating an entity which is measured, estimated, evaluated, calculated or determined but which does not constitute an entity which is adjusted or changed by the control process per se
• CPC Class Codes: B65H 2511/20 Location in space
• CPC Class Codes: B65H 2511/512 Marks, e.g. invisible to the human eye; Patterns
• CPC Class Codes: B65H 2553/42 Cameras
• CPC Class Codes: B65H 2801/42 Die-cutting
• CPC Class Codes: B65H 35/00 Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers cutting or perforating machines or devices in general B26D, B26F
• CPC Class Codes: B65H 5/085 by combinations of endless conveyors and grippers suction belts B65H5/224
• CPC Class Codes: G07C 3/14 Quality control systems
• CPC Class Codes: H01L 2224/78308 Removable capillary
• CPC Class Codes: Y10T 156/1322 Severing before bonding or assembling of parts

Abstract

A device for controlling the production quality of a press, which manufactures package blanks from a sheet of material by transferring the sheet of materials, such as paperboard or corrugated board, chronologically through an infeed station, a die-cutting station, a waste-stripping station and a delivery station, has an arrangement for controlling the printing and blanking quality which includes a camera scanning the color register marks and a register mark for the positioning of the blanking of the sheet. The camera is located at the outlet of the die-cutting station so that it can scan the marks applied on the lower side of the sheet. The device includes a marking device, which is driven by the arrangement for controlling the printing and blanking quality, to mark a defective sheet and is positioned in the delivery station of the press.

Claims

1. In a device for controlling the production quality of a press that manufactures package blanks from sheets by conveying a sheet of material in a chronological order through an infeed station, a die-cutting station, a waste-stripping station and a delivery station for forming a stack of die-cut sheets, the production of said press being checked by means for controlling the printing and blanking quality which include a camera for the scanning of color register marks and a register mark for the positioning of the blanking, the improvements comprising said camera being located at an outlet of the die-cutting station so that it can scan the marks applied on the lower side of the sheet and said device having means for marking an edge of a sheet actuated by the means for controlling the printing blank quality in response to the detecting of a defective sheet so that the deflective sheet can be located in said stack of die-cut sheets.

2. In a device according to claim 1, wherein the camera is mounted on an outlet of the die-cutting station by adjustable mounting means so that it may be shifted laterally depending on the location of the register marks applied on a lower side of the sheet.

3. In a device according to claim 1, wherein the register mark for the positioning of the blanking is achieved by a punch mounted in a die-cutting tool of the press that is processing the sheets, said punch coacting with a matrix arranged in a die-cutting counter-tool of the die-cutting station.

8. In a device according to claim 1, wherein the marking means consists of an element which applies a strip on the lateral edges of the defective sheet.

4. In a device for controlling the production quality of a press that manufactures package blanks from sheets by conveying a sheet of material in a chronological order through an infeed station, a die-cutting station, a waste-stripping station and a delivery station, the production of said press being checked by means for controlling the printing and blanking quality which include a camera for the scanning of color register marks and a register mark for the positioning of the blanking, the improvements comprising said camera being located at an outlet of the die-cutting station so that it can scan the marks applied on the lower side of the sheet and said device having means for marking a sheet actuated by the means for controlling the printing blank quality in response to the detecting of a defective sheet, said means for marking having a pneumatic cylinder having a rod connected to a perforator, said cylinder being mounted on a fastening plate adjusted laterally so as to adjust the position of the marking means according to the size of the sheet to be processed and by the fact that the marking means is arranged so as to follow the vertical movement of the lower frame of a device for removing front waste from a sheet.

5. In a device according to claim 4, wherein the marking means makes an identification imprint on one of the lateral edges of the defective sheet.

6. In a device according to claim 4, wherein the marking means makes an identification imprint in an area situated between a front waste and a blank of the sheet.

9. In a device according to claim 4, wherein the camera is mounted on an outlet of the die-cutting station by adjustable mounting means so that it may be shifted laterally depending on the location of the register marks applied on a lower side of the sheet.

10. In a device according to claim 4, wherein the register mark for the positioning of the blanking is achieved by a punch mounted in a die-cutting tool of the press that is processing the sheets, said punch coacting with a matrix arranged in a die-cutting counter-tool of the die-cutting station.

7. In a device for controlling the production quality of a press that manufactures package blanks from sheets by conveying a sheet of material in a chronological order through an infeed station, a die-cutting station, a waste-stripping station and a delivery station, the production of said press being checked by means for controlling the printing and blanking quality which includes a camera for the scanning of color register marks and a register mark for the positioning of the blanking, the improvements comprising said camera being located at an outlet of the die-cutting station so that it can scan the marks applied on the lower side of the sheet and said devices having means for marking a sheet actuated by the means for controlling the printing blank quality in response to the detecting of a defective sheet, said means for marking consisting of a nozzle which splashes an ink sensitive to ultra-violet rays on only an edge of the defective sheet.

11. In a device according to claim 7, wherein the camera is mounted on an outlet of the die-cutting station by adjustable mounting means so that it may be shifted laterally depending on the location of the register marks applied on a lower side of the sheet.

12. In a device according to claim 7, wherein the register mark for the positioning of the blanking is achieved by a punch mounted in a die-cutting tool of the press that is processing the sheets, said punch coacting with a matrix arranged in a die-cutting counter-tool of the die-cutting station.