Three-side trimmer, especially for short runs

• US 7,533,596 B2
• Filed: 01/16/2002
• Issued: 05/19/2009
• Est. Priority Date: 01/17/2001
• Status: Expired due to Term

• Current Assignee: Muller Martini Holding Ag (Muller Martini Corporation)
• Original Assignee: Muller Martini Holding Ag (Muller Martini Corporation)
• Inventors: Rathert, Horst
• Primary Examiner(s): Peterson; Kenneth E.
• Application Number:
  US10/051,577
• Publication Number:
  US 20020092394A1
• Time in Patent Office: 2,680 Days
• Field of Search: 834/65, 834/58, 832/13, 834/041, 834/33, 839/34, 269/217, 269/275, 412/10, 412/22, 412/23, 100/211
• US Class Current: 83/404.1
• CPC Class Codes: B26D 1/09 with a plurality of cutting members
• CPC Class Codes: B26D 11/00 Combinations of several similar cutting apparatus
• CPC Class Codes: B26D 2007/0081 Cutting on three sides, e.g. trilateral trimming
• CPC Class Codes: B26D 5/00 Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
• CPC Class Codes: B26D 5/08 Means for actuating the cutting member to effect the cut
• CPC Class Codes: B26D 7/025 acting upon planar surfaces B26D7/04 takes precedence
• CPC Class Codes: B26D 7/20 Cutting beds B26D7/018 takes precedence; supporting beds for severing by means of a fluid jet B26F3/008
• CPC Class Codes: Y10S 83/934 Book, being made, e.g. trimming a signature
• CPC Class Codes: Y10T 83/2192 Endless conveyor
• CPC Class Codes: Y10T 83/447 Plural tools successively actuated at same station
• CPC Class Codes: Y10T 83/6478 Tool stations angularly related
• CPC Class Codes: Y10T 83/7487 Means to clamp work
• CPC Class Codes: Y10T 83/7573 Including clamping face of specific structure
• CPC Class Codes: Y10T 83/8799 Plural tool pairs
• CPC Class Codes: Y10T 83/8874 Uniplanar compound motion
• CPC Class Codes: Y10T 83/9401 Cutting edge wholly normal to axis of rotation
• CPC Class Codes: Y10T 83/95 Machine frame

Abstract

The three-side trimmer comprises three compact cutting units of a nearly identical design, which have a flow of forces that is closed in itself and separate drives. Full-area cutting tables and pressing plates and telescopic cutting tables and pressing plates in the head-and-foot station ensure optimal quality of cut while avoiding the use of replaceable parts for format change. Due to elastic design and a slightly oblique positioning of the pressing plates, air inclusions are prevented from occurring during the pressing. A most lightweight design possible with weak dynamic forces to achieve good quality of cut are provided while avoiding the use of replaceable parts for format change.

Claims

1. A trimmer comprising:

a common support frame; and

first and second cutting stations each with a cutting unit, each said cutting unit including a cutting strip and a knife for an oblique swing cut against a respective said cutting strip, said each cutting unit including a unit frame connecting said respective cutting strip to a respective said knife, said knife and said cutting strip of each respective cutting station being arranged on a respective said unit frame to perform the oblique swing cut, each of said first and second cutting stations including a table fastened to a respective said unit frame;

each of said first and second cutting stations including a pressing element movably mounted on a respective said unit frame, said table and said pressing element of each cutting station being arranged to press a block between said table and said pressing element,

each said unit frame absorbing all pressing forces between respective said pressing elements and respective said tables, each said table and pressing element being movable with a respective said cutting unit on said support frame, wherein one of said cutting stations is a front cutting station and the cutting table of the front cutting station corresponds to a largest format and one of said pressing elements has a rigid front part near the knife and with a slightly obliquely positioned elastic rear part.

2. A trimmer in accordance with claim 1, where:

said pressing elements are arranged obliquely to first touch one side of a top surface of the block when said pressing element presses the block.

3. A trimmer in accordance with claim 2, wherein:

the one side of the top surface of the block is spaced from the respective said knife.

4. A trimmer in accordance with claim 1, wherein:

said pressing elements each have a fixed support and an oblique support, said oblique support being more elastic than said fixed support.

5. A trimmer comprising:

a common support frame;

first and second cutting units movably mounted on said common support frame, each said cutting unit including a unit frame, a cutting strip connected to each respective said unit frame, and a knife movably mounted on said each respective unit frame for an oblique swing cut against a respective said cutting strip; and

a drive unit mounted on said each unit frame of each cutting station, said drive unit generating a cutting force for moving a respective said knife against a respective said cutting strip during the oblique swing cut, each said unit frame absorbing all the cutting forces between said knife and said cutting strip during the oblique swing cut,

wherein each of said first and second cutting units further includes a table fastened to a respective said unit frame and a pressing element movably mounted on a respective said unit frame, said table and said pressing element of each cutting unit being arranged to press a block between said table and said pressing element, each said unit frame absorbing all pressing forces between respective said pressing elements and respective said tables, each said table and pressing element being movable with a respective said cutting unit on said support frame, and said pressing elements each have a rigid front part near the knife and an obliquely positioned elastic rear part arranged to first touch one side of a top surface of the block when said pressing element presses the block.

6. A trimmer in accordance with claim 5, wherein:

the one side of the top surface of the block is spaced from the respective said knife.

7. A trimmer in accordance with claim 5, wherein:

said pressing elements each have a fixed support, said fixed support being arranged closer to a respective said knife than said oblique support.

8. A trimmer in accordance with claim 5, wherein:

said pressing elements each have a fixed support, said oblique support being more elastic than said fixed support.

9. A trimmer in accordance with claim 5, wherein:

said oblique support is arranged to remove air present in the block starting at the one side of the top surface when said pressing element presses the block.

10. A trimmer in accordance with claim 5, further comprising a third cutting unit movably mounted on said common support frame, said third cutting unit including a unit frame, a cutting strip and a knife arranged similar to said first and second cutting units, said first, second and third cutting units being arranged on said common support frame to trim a head, foot and front of a block.