Method for dynamically aligning substrates bearing printed reference marks and codes for automated cutting or scoring, and substrates so cut or scored

• US 7,182,007 B2
• Filed: 01/29/2004
• Issued: 02/27/2007
• Est. Priority Date: 01/29/2004
• Status: Active Grant

• Current Assignee: Esko-Graphics Kongsberg AS
• Original Assignee: ESKO-Graphics A/S (Danaher Corporation)
• Inventors: Berge, John, Reggestad, Martin
• Primary Examiner(s): Ashley; Boyer D.
• Assistant Examiner(s): Alie; Ghassem
• Application Number:
  US10/769,736
• Publication Number:
  US 20050166744A1
• Time in Patent Office: 1,125 Days
• Field of Search: 83/13, 83/621, 83D/IG.1, 838/79, 838/80, 834/12, 833/71, 83/39, 83/768, 83/767, 833/65, 833/70, 833/64, 833/68, 83/34, 83/755, 83/79, 83/75, 83/74, 271/10.1, 271/102, 271/3.13, 271/3.15, 270/1.1, 270/45, 347/157, 700/259
• US Class Current: 83/13
• 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 5/005 Computer numerical control means
• CPC Class Codes: B26D 5/007 Control means comprising cameras, vision or image processing systems
• CPC Class Codes: B26D 5/32 with the record carrier formed by the work itself
• CPC Class Codes: B26D 5/34 scanning being effected by a photosensitive device
• CPC Class Codes: B26D 5/42 with interrelated action between work feed and clamp work clamping arrangements B26D7/02
• CPC Class Codes: B26D 7/27 Means for performing other operations combined with cutting B26D9/00 takes precedence
• CPC Class Codes: B31B 2100/00 Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
• CPC Class Codes: B31B 2100/0024 having all side walls attached to the bottom
• CPC Class Codes: B31B 2110/35 rectangular, e.g. square
• CPC Class Codes: B31B 50/006 Controlling; Regulating; Measuring; Improving safety
• CPC Class Codes: B31B 50/044 involving aligning
• CPC Class Codes: B31B 50/20 Cutting sheets or blanks
• CPC Class Codes: Y10T 83/0333 Scoring
• CPC Class Codes: Y10T 83/0341 Processes
• CPC Class Codes: Y10T 83/04 Processes
• CPC Class Codes: Y10T 83/178 Responsive to work
• CPC Class Codes: Y10T 83/531 With plural work-sensing means
• CPC Class Codes: Y10T 83/543 Sensing means responsive to work indicium or irregularity

Abstract

A substrate to be cut and/or scored is pre-printed with graphics, at least first and second registration marks, and optional encoded-to-print instructions, bar-encoded data, as well as ordinary graphics. The registration marks are sensed as the substrate is automatically transported to a cutting table station that defines a cutting reference plane. Sensed detection of location of the registration marks relative to the reference plane enable the cutting plan for the substrate to be amended for precise location of the graphics on the substrate relative to the reference plane. Automated cutting according to the amended cutting plan occurs. As the registration marks were printed simultaneously with and in known relationship to the graphics, the cut line will be precise relative to the graphics. Machine readable encoded-to-print instructions optionally printed on the substrate can further amend the cutting plan.

Claims

1. A method of cutting and/or scoring a substrate according to an amendable cutting plan relative to graphics printed on an upper or lower surface of the substrate, the method comprising the following steps:

(a) pre-printing on said surface of said substrate said graphics, and at least a first registration mark and a second registration mark;

(b) automatically transporting said substrate from an in-stack region to a cutting table station along an x-axis, said cutting table station defining a reference frame;

(c) while step (b) is carried out, optically detecting presence of said first registration mark and detecting position thereof relative to said cutting table station reference frame;

(d) while step (b) is carried out and subsequent to step (c), detecting presence of said second registration mark and detecting position thereof relative to said cutting table station reference frame;

(e) using positional information acquired at step (c) and at step (d) to amend said cutting plan as needed to account for actual position and orientation of said substrate on said cutting table station; and

(f) cutting and/or scoring said substrate according to said cutting plan as amended at step (e).

2. The method of claim 1, further including:

reducing transport velocity or stopping movement of said substrate between step (c) and step (d) so as to maintain acceptably good transport throughput while maintaining acceptable accuracy of positional measurement at step (d).

3. The method of claim 1, wherein step (f) is carried out from a lower surface of said substrate.

4. The method of claim 1, wherein said surface of said substrate is pre-printed with at least one set of encoded-into-print instructions;

and

step (e) includes further amending said cutting plan according to said encoded-into-print instructions.

5. The method of claim 1, wherein step (e) enables human input of correctional information.

6. The method of claim 1, wherein transport velocity of said substrate is in a range up to 2 m/sec.

7. The method of claim 1, wherein step (d) achieves x-axis positional accuracy of said second registration mark within an acceptable range.

8. The method of claim 1, wherein steps (b), (c), (d), and (e) are carried out under computer control.