Apparatus for producing envelope blanks

• US 4,601,688 A
• Filed: 10/19/1983
• Issued: 07/22/1986
• Est. Priority Date: 04/06/1983
• Status: Expired due to Fees

• Current Assignee: Chapman Envelopes Limited Chapman House Farwig Lane Bromley Kent England
• Original Assignee: Chapman Envelopes Ltd. (Mayer-Kuvert GmbH & Co. KG)
• Inventors: Deverell, Roy A.
• Primary Examiner(s): Combs, E. Michael
• Application Number:
  US06/543,509
• Time in Patent Office: 1,007 Days
• Field of Search: 83/355, 83/356.1, 83/356.3, 83/357, 83/911, 83/917, 493/227, 493/237, 493/238, 493/239
• US Class Current: 493/238
• CPC Class Codes: B26D 3/14 Forming notches in marginal portion of work by cutting by punching B26F1/12
• CPC Class Codes: B31B 50/16 Cutting webs
• CPC Class Codes: B31B 50/18 longitudinally
• CPC Class Codes: Y10S 83/911 Envelope blank forming

Abstract

An apparatus for producing envelope blanks has means for advancing a continuous web of paper along a horizontal path, two sets of rotatable cutter blades are located one on each side of the path of travel of the web. The blades are operable to cut out portions from each side of the web. The blades on each side of the said path being located on a common shaft. Each set of cutter blades comprises at least three cutter blades. Each blade is located on a cutter bracket mounted on the shaft so that the angular position of the blade on the shaft is adjustable through 360°. Each blade in each set is located opposite a similar blade in the other set to form a matching pair and the cutting profiles of the blades in each set are different and including a cutting point in each blade. The positions of the common shafts are also adjustable so that the sets of cutter blades are movable towards each other or away from each other as desired.

Claims

1. In an apparatus for producing envelope blanks comprising means for advancing a continuous web of paper along a horizontal path and two sets of rotatable cutter blades located one on each side of the path of travel of the web and operable to cut out portions from each side of the web, the blades on one side of the said path being located on a common shaft and the blades on the other side of the said path being located on a common shaft, the improvement wherein each set of cutter blades comprises at least three longitudinally spaced movable cutter blades, each of said movable cutter blades being positioned in longitudinal alignment with a different respective stationary blade, each movable blade being located on a cutter bracket mounted on its common shaft so that the angular position of the blade on that shaft is adjustable through 360°

, each movable blade in each set being located opposite a similar movable blade in the other set to form a matching pair and the cutting profiles of said movable blades in each set being different and including a cutting point in each movable blade.

2. Apparatus as claimed in claim 1 wherein trimming cutter means are provided in such a position that they are passed by blanks cut from the web by the opposed set of movable cutter blades, such trimming cutter means being operable to trim surplus portions of paper from the blanks.

3. An apparatus according to claim 2 comprising means operable to sever the web transversely at regular portions along its length thereby to produce separate blanks from the continuous web.

4. An apparatus as claimed in claim 1, wherein each movable blade is carried on its common shaft by a bracket so mounted on the shaft that the angular position of said movable blade is adjustable through 360°

, each bracket having a screw clamp by which the bracket can be fixed in a desired setting.

5. An apparatus as claimed in claim 4 wherein the bracket is so mounted on the shaft that each movable cutter blade is adjustable longitudinally of the shaft.

6. An apparatus as in claim 1, and means for adjusting the position of the common shafts so that the sets of movable cutter blades are movable towards each other or away from each other as desired.