Apparatus for the manufacture of sheets of corrugated board of variable size

• US 5,918,519 A
• Filed: 04/17/1997
• Issued: 07/06/1999
• Est. Priority Date: 07/16/1994
• Status: Expired due to Term

• Current Assignee: BHS Corrugated Maschinen- und Anlagenbau GmbH (Bwv-Wellpappenmaschinen Vertriebs-GmbH)
• Original Assignee: BHS Corrugated Maschinen- und Anlagenbau GmbH (Bwv-Wellpappenmaschinen Vertriebs-GmbH)
• Inventors: Schnabel, Klaus, Waldeck, Karl, Bradatsch, Edmund
• Primary Examiner(s): Rachuba, M.
• Assistant Examiner(s): PRYOR, SEAN AUGUSTUS
• Application Number:
  US08/842,832
• Time in Patent Office: 810 Days
• Field of Search: 83/676, 83/428, 83/498, 83/499, 83/504, 83/425.4, 83/508.3, 83/508.2, 83/102
• US Class Current: 83/428
• CPC Class Codes: B26D 2007/0068 Trimming and removing web edges
• CPC Class Codes: B31B 50/00 Making rigid or semi-rigid containers, e.g. boxes or cartons
• CPC Class Codes: B31B 50/16 Cutting webs
• CPC Class Codes: B31B 50/18 longitudinally
• CPC Class Codes: Y10T 83/2074 Including means to divert one portion of product from another
• CPC Class Codes: Y10T 83/659 Tools axially shiftable on support
• CPC Class Codes: Y10T 83/6595 With means to move tool laterally of feed direction during cutting
• CPC Class Codes: Y10T 83/7822 Tool pair axially shiftable
• CPC Class Codes: Y10T 83/7872 Tool element mounted for adjustment
• CPC Class Codes: Y10T 83/9403 Disc type

Abstract

An apparatus for the manufacture of sheets of corrugated web of variable size comprises a margin cutting arrangement, which is disposed--in the conveying direction--downstream of, and separated from, longitudinal cutting arrangements and which is provided with cutting devices for cutting margins, which are permanently in engagement with the web of corrugated board. In the case of changes of format width accompanied by changes of the width of the margins to be cut off, this makes it possible that the latter can be cut continuously, which helps avoid malfunction.

Claims

1. An apparatus for the manufacture of sheets of corrugated board of variable size, comprising

at least one longitudinal cutting arrangement (5, 6) having longitudinal cutters (8) adjustable at right angles to a conveying direction (1) of a nondivided web (2) of corrugated board for cutting said nondivided web (2) into nondivided sectional webs (19a to 19d;

22a to 22d) of corrugated board of differing format width,

cutting devices (10,

     11) adjustable at right angles to the conveying direction (1) of said web (2) of corrugated board for cutting lateral margins (12,

     13) of said web (2) of corrugated board,

discharge devices (14,

     15) for margins (12,

     13) that have been cut off, and

at least one cross cutting arrangement (33) for cutting sheets of corrugated board from said nondivided sectional webs (19a to 19d;

22a to 22d) of corrugated board, wherein the cutting devices (10, 11;

10'"'"', 11'"'"') for cutting the margins (12,

     13) of said web (2) of corrugated board are displaceable at right angles to the conveying direction (1) of said web (2) of corrugated board independently of the longitudinal cutters (8) for cutting said nondivided sectional webs (19a to 19d;

20a to 22d) of corrugated board and

wherein means for cutting continuous margins (12,

     13) before and after a chance of format width by holding said cutting devices (10, 11;

10'"'"', 11'"'"') permanently in engagement with said web (2) of corrugated board at least during said change of format width are provided.

4. An apparatus according to claim 1, wherein each cutting device (10'"'"', 11'"'"') has a knife disk (54) driven in rotation and pivotable about a vertical pendulum axis (50).

5. An apparatus according to claim 4, wherein the knife disk (54) is freely pivotable about the pendulum axis (50).

6. An apparatus according to claim 4, wherein--referred to the conveying direction (1) of the web (2) of corrugated board--the knife disk (54) is disposed downstream of the pendulum axis (50).

7. An apparatus according to claim 4, wherein each cutting device (10'"'"', 11'"'"') has a transverse slide (39), which is displaceable at right angles to the conveying direction (1) and on which the knife disk (54) is supported pivotably about the pendulum axis (50).

8. An apparatus according to claim 6, wherein the knife disk (54) is drivable by a belt drive (65), which comprises a pinion (60) being rotable but otherwise stationary relative to the transverse slide (39) and a gear (62), which is coupled with the pinion (60) via a belt (61) and which, together with the knife disk (54), is pivotable about the pendulum axis (50), the pendulum axis (50) being the central axis of the belt drive (65).

9. An apparatus according to claim 8, wherein the pinion (6) is non-rotatable relative to and displaceable along a knife driving shaft (59).

10. An apparatus according to claim 4, wherein the knife disk (54) has a cutting level (54a), which intersects the pendulum axis (50).

11. An apparatus according to claim 4, wherein means for arresting each cutting device (10'"'"', 11'"'"') in a position of the knife disk (54) in the conveying direction (1) are provided.

12. An apparatus according to claim 7, wherein an arresting device (75) is provided between each cutting device (10'"'"', 11'"'"') and the transverse slide (39).

13. An apparatus according to claim 12, wherein each arresting device (75) comprises at least a stop (77) and two a pneumatically actuated piston-cylinder unit (83) cooperating with the latter.

14. An apparatus according to claim 13, wherein each arresting device (75) comprises two stops (77) and two piston-cylinder units (83) disposed on both sides of the pendulum axis (50) at a distance from each other.

15. An apparatus according to claim 13, wherein the distance between the stop (77) and the piston-cylinder unit (83) is adjustable.

2. An apparatus for the manufacture of sheets of corrugated board of variable size, comprising

at least one longitudinal cutting arrangement (5, 6) having longitudinal cutters (8) adjustable at right angles to a conveying direction (1) of a nondivided web (2) of corrugated board for cutting said nondivided web (2) into nondivided sectional webs (19a to 19d;

22a to 22d) of corrugated board of differing format width,

cutting devices (10,

     11) adjustable at right angles to the conveying direction (1) of said web (2) of corrugated board for cutting lateral margins (12,

     13) of said web (2) of corrugated board,

discharge devices (14,

     15) for margins (12,

     13) that have been cut off, and

at least one cross cutting arrangement (33) for cutting sheets of corrugated board from said nondivided sectional webs (19a to 19d;

22a to 22d) of corrugated board, wherein the cutting devices (10, 11;

10'"'"', 11'"'"') for cutting the margins (12,

     13) of said web (2) of corrugated board are displaceable at right angles to the conveying direction (1) of said web (2) of corrugated board independently of the longitudinal cutters (8) for cutting said nondivided sectional webs (19a to 19d;

20a to 22d) of corrugated board, wherein means for cutting continuous margins (12,

     13) before and after a change of format width by holding said cutting devices (10, 11;

10'"'"', 11'"'"') permanently in engagement with said web (2) of corrugated board at least during said change of format width are provided, and

wherein the discharge devices (14, 15;

14'"'"', 15'"'"') for the margins (12,

     13) are displaceable at right angles to the conveying direction (1) of the web (2) of corrugated board and wherein one cutting device (10, 11;

10'"'"', 11'"'"') at a time for cutting a margin (12,

     13) is coupled with a discharge device (14, 15;

14'"'"', 15'"'"').

3. An apparatus according to claim 2, wherein one cutting device (10, 11;

10'"'"', 11'"'"') at a time for cutting a margin (12,

     13) is mechanically coupled with a discharge device (14, 15;

14'"'"', 15'"'"').

16. An apparatus according to claim 2, wherein each cutting device (10'"'"', 11'"'"') has a knife disk (54) driven in rotation and pivotable about a vertical pendulum axis (50).

17. An apparatus according to claim 16, wherein the knife disk (54) is freely pivotable about the pendulum axis (50).

18. an apparatus according to claim 16, wherein--referred to the conveying direction (1) of the web (2) of corrugated board--the knife disk (54) is disposed downstream of the pendulum axis (50).

19. An apparatus according to claim 16, wherein each cutting device (10'"'"', 11'"'"') has a transverse slide (30), which is displaceable at right angles to the direction (1) and on which the knife disk (54) is supported pivotably about the pendulum axis (50).

20. An apparatus according to claim 18, wherein the knife disk (54) is drivable by a belt drive (65), which comprises a pinion (60) stationary relative to the transverse slide (39) and a gear (62), which is coupled with the pinion (60) via a belt (61) and which, together with the knife disk (54), is pivotable about the pendulum axis (50), the pendulum axis (50) being the central axis of the belt drive (65).

21. An apparatus according to claim 20, wherein the pinion (60) is disposed non-rotatably, but displaceably on a knife driving shaft (59).

22. An apparatus according to claim 16, wherein the knife disk (54) has a cutting level (54a), which intersects the pendulum axis (50).

23. An apparatus according to claim 16, wherein said each cutting device (10'"'"', 11'"'"') is arrestable in a position of the knife disk (54) in the conveying direction (1).

24. An apparatus according to claim 19, wherein an arresting device (75) is provided between each cutting device (10'"'"', 11'"'"') and the transverse slide (39).

25. An apparatus according to claim 24, wherein each arresting device (75) comprises at least a stop (77) and a pneumatically actuated piston-cylinder unit (83) cooperating with the latter.

26. An apparatus according to claim 25, wherein each arresting device (75) comprises two stops (77) and piston-cylinder units (83) disposed on both sides of the pendulum axis (50) at a distance from each other.

27. An apparatus according to claim 25, wherein the distance between the stop (77) and the piston-cylinder unit (83) is adjustable.