Apparatus and method for rotary pressure cutting
AssigneeTamarack Products, Inc.
InventorDavid Machamer
Life of this patent
Estimating the term…
Abstract
An improved rotary pressure cutting apparatus that cuts, perforates, and scores plies of paper, window materials, label stock, and plastic laminates in conjunction with soft, discontinuous, and/or non-cylindrical anvil surfaces. A light weight, low mass anvil in the form of a metallic sheet is supported in a strike position beneath a rotating blade. The anvil is biased by springs or elastomeric members toward the strike position and moves with the material being cut and the moving cutting blade during a cut. The anvil is returned to the strike position by the biasing member upon completion of the cut.
Claims19
Apparatus for rotary pressure cutting source material in the form of a web, comprising:
- a rotating cutting cylinder having a cutting blade mounted adjacent a periphery thereof and projecting beyond said periphery;
- a support defining a support surface adjacent said periphery of said cutting cylinder to define a space for receiving said source material;
- a thin metal anvil of low mass;
- a resilient mount securing said anvil in an initial position in said space between said cutting cylinder and said support surface;
- a feeder feeding said source material into said space between said cutting cylinder and said anvil;
- said cutting cylinder, support, anvil and resilient mount constructed and arranged such that when said blade is rotated to said initial cutting position and engages said source material for initial cutting action, pressure is applied to said source material and said anvil such that said anvil is moved in a direction of movement of said source material and supports said source material as said blade cuts said source material while being supported by said support, and said anvil is returned to said initial position by said resilient mount when a cut is completed.
A method of pressure cutting source material having first and second sides into individual patches comprising:
- rotating a cutting cylinder having a blade mounted thereto for engaging said first side of said source material;
- providing a moveable anvil engaging and supporting said second side of said source material;
- mounting said anvil to permit motion tangential of said cutting cylinder as said blade strikes said source material;
- supporting said anvil as said source material passes said cutting cylinder in a region of cutting;
- and
- restoring said anvil to its original cutting position after each cut is completed.
In an apparatus for pressure cutting continuous source material, the combination comprising:
- a conveyor including at least one belt for supporting and conveying said source material;
- a rotating cutting cylinder having at least one blade mounted thereon and positioned to cut said source material into discrete patches;
- an anvil in the form of a sheet of hardened metal interposed between said source material and said belt adjacent a location where said blade contacts said source material;
- and
- a resilient mount for mounting said anvil at an initial position adjacent said location where said blade contacts said source material while permitting said anvil to move in the direction of said blade during a cut and restoring said anvil to said initial position after a cut.
Dependencies are inferred from the claim text.