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US 7,610,737 B2Granted
Continuous motion wrapping method
AssigneeValley Tissue Packaging, Inc.
InventorLloyd Kovacs
Life of this patent
Estimating the term…
Abstract
A method, system, and apparatus for separating products, such as napkins or rolls of paper, encased in a tube of continuously moving thermoplastic wrapping material into product units is disclosed. At predetermined intervals spaced products are fed into the tube at wrapper length intervals, and the tube is thermally cut at wrapper intervals to form individually girth wrapped articles.
Claims12
A method of packaging products in a tubular thermoplastic material comprising:
- forming a moving tube of thermoplastic material from a web of said material;
- delivering spaced product units to be wrapped into the tube;
- and
- separating the spaced product units in the tube from one another with a heated cutting element that travels along a cutting path defining a horizontal velocity component of at least about 80 feet per minute the cutting path defining a first cutting segment and a second cutting segment that cross each other at a crossing point,
- wherein while traveling through a single cycle of the cutting path, the heated cutting element passes through the crossing point (i) once in a downward direction and (ii) once in an upward direction.
2 more elements
A method of packaging products in a tubular thermoplastic material comprising:
- forming a moving tube of thermoplastic material from a web of said material;
- delivering spaced product units to be wrapped into the tube;
- and
- separating the spaced product units in the tube from one another with a heated cutting element;
- and
- moving the heated cutting element through a cutting path that defines,
- (i) a first cutting segment through which the heated cutting element moves downwardly through the tube;
- (ii) a second cutting segment that intersects and crosses through the first cutting segment, the heated cutting element moving upwardly through the tube while moving through the second cutting segment;
- (iii) a lower direction change segment connecting lower portions of the first and second cutting segments;
- and
- (iv) an upper direction change segment connecting upper portions of the first and second cutting segments.
8 more elements
Dependencies are inferred from the claim text.