Repetitive arc cutting of continuous sheeting
AssigneeFirst Brands Corporation
InventorHarry A. Landeck
Life of this patent
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Abstract
A process and apparatus for making a repetitive arc cut in a continuous manner in a continuous supply of sheeting possessing edges, which involves providing a moving sheeting across a cutting area and passing through the area an arc-directed omnidirectional cutting means at and across an edge, in the general direction of the sheeting, to puncture a portion of the moving sheeting, maintaining the arc directed velocity of the omnidirectional cutting device at a rate greater than that of the directional velocity of the sheeting such that the puncture is enlarged to a lineal cut. The most favorable application of the invention involves the use of waterjet cutting to cut holes, especially primarily round holes, in multi-wall plastic constructions.
Claims43
A process for making a repetitive arc cut in a continuous manner in a continuous supply of plastic sheeting possessing edges which comprises passing a continuous supply of plastic sheeting across a cutting area and while therein an arc-directed omnidirectional cutting means follows along a 360 degree circular path, a portion of which passes through a cutting area in an arc-defined motion across an edge of the sheeting in the direction of movement of the sheeting at a speed greater than that of the plastic sheeting to puncture at least a portion of the moving plastic sheeting;
- maintaining the speed of the omnidirectional cutting means at a speed greater than the speed of the plastic sheeting such that the puncture is enlarged to a lineal cut, and thereafter removing plastic sheeting containing the lineal cut and removing the omnidirectional cutting means from the cutting area along the circular path.
A process for making a repetitive arc cut in a continuous manner in a continuous supply of plastic sheeting possessing a folded edge which comprises passing a continuous supply of plastic sheeting across a cutting area and while therein a revolving waterjet cutter along a 360 degree circular path in an arc-defined motion through the cutting area across a folded edge of the plastic sheeting in the direction of movement of the plastic sheeting at a speed greater than that of the speed of the plastic sheeting to puncture at least a portion of the folded edge of the moving plastic sheeting;
- maintaining the revolution of the waterjet cutter at a speed greater than the speed of the plastic sheeting such that the puncture in the folded edge is enlarged to a lineal cut;
- and thereafter removing plastic sheeting containing the lineal cut and the waterjet cutter from the cutting area.
An apparatus for making a repetitive arc cut in a continuous manner in a continuous supply of plastic sheeting possessing edges, comprising means for receiving a moving plastic sheeting having edges in a cutting area thereof, means to follow along a 360 degree circular path for passing an arc-directed omnidirectional cutting means through the cutting area a portion of which passes through the cutting area to be occupied by an edge of the plastic sheeting and in the direction of movement of the plastic sheeting, at a speed greater than the speed of the plastic sheeting, means for puncturing the sheeting located in the cutting area and initiating the cutting with the omnidirectional cutting means of the plastic sheeting within the cutting area to form a cut portion, and means for withdrawing the cut portion of the plastic sheeting from the cutting area along the circular path.
An apparatus for making a repetitive arc cut in a continuous manner in a continuous supply of plastic sheeting possessing a folded edge comprising:
- (a) means for receiving a moving plastic sheeting having a folded edge in a cutting area thereof;
- (b) revolution means for passing an arc-directed waterjet cutter along a 360 degree circular path through and from the cutting area, over the cutting area to be occupied by the folded edge of the plastic sheeting and in the direction of movement of the plastic sheeting, at a speed greater than the speed of the plastic sheeting;
- (c) means for puncturing the folded edge of the plastic sheeting located in the cutting area and initiating the cutting with the waterjet cutter of the plastic sheeting within the cutting area to form a cut portion;
- (d) means for withdrawing the cut portion of sheeting from the cutting area;
- and
- (e) means for collecting water issuing from the waterjet cutter.
Dependencies are inferred from the claim text.