Cutter for plaster board and the like
OwnerJames E. Altmaninventor
Life of this patent
Estimating the term…
Abstract
A cutter for sheet materials such as plasterboard and the like which employs a pair of axially spaced, copolanar circular blades with circumferential edges in adjacent noncontacting relationship. Both blades are driven but under conditions such that an edge speed differential exists between the blades. Supported sheet material is passed between the nip region between the blades to effectuate cutting. During cutting, the sheet material is self-propelled through the nip region by the action of the blades. Very little dust is produced during such sheet cutting.
Claims13
A cutter for sheet material comprising in combination:
- (A) a pair of axially spaced coplanar circular blades having their respective circumferential edges in an adjacent but noncontacting relationship, thereby to define a nip region,
- (B) powerhead means for rotatably driving each of said blades, including shaft means axially associated with each of said blades,
- (C) means for rotating one of said blades at a higher edge speed than the other thererof, and
- (D) frame means for supporting such sheet material for passage through said nip region and for supporting said blade pair, said powerhead means, and said means for rotating.
A process for making straight cuts in sheet material such as plasterboard and the like comprising the steps of:
- (A) supporting such a sheet material,
- (B) introducing an edge of such sheet material into the nip region existing between a pair of axially spaced coplanar circular blade members which have their respective circumferential edges in an adjacent but noncontacting relationship, said nip region being located about in the middle of such edge by said supporting
- (C) rotating said blade members while maintaining a blade edge differential speed between said blade members
- (D) permitting such sheet material after said introducing to travel through said nip region.
Dependencies are inferred from the claim text.