Textiles: cloth finishing – Cutting – Shearing
Reexamination Certificate
2000-03-24
2001-03-06
Vanatta, Amy B. (Department: 3741)
Textiles: cloth finishing
Cutting
Shearing
C026S007000
Reexamination Certificate
active
06195853
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a shearing device. More particularly, the present invention relates to an improved device for shearing pile fibers from the surface of fabrics.
2. Description of Prior Art
Shearing machines are widely used in the garment manufacturing industry for shearing fibers from the surface of fabrics to produce a clean uniform appearance. There are several varieties of machines used for this purpose known in the art.
One common device has a stationary flat blade and spiral blades contacting the flat blade. The spiral blades are shaped in the form of a helix and are positioned on a cutting cylinder. As the cutting cylinder rotates, the spiral blades rotates and produces a cutting region at the points of contact with the flat blade. Fiber is cut at the cutting region and a suction device removes the cut fibers. One type of such machine is taught in U.S. Pat. No. 5,483,729 issued to Fayard et al. A disadvantage of this type of machine its relatively high cost and ease of breakage.
None of the prior art teaches a device for shearing fibers from fabrics as taught by the present invention.
SUMMARY OF THE INVENTION
The present invention is contrived to overcome the conventional disadvantages. Accordingly, it is an object of the present invention to provide a device for shearing fibers from fabrics sheet which is relatively inexpensive to manufacture and which has increased reliability in terms of breaking down.
The device has a pair of shearing machines secured in a housing between a top sheet member and a bottom sheet member. Each shearing machine has a case and a pair of blades, an outer blade and an inner blade secured onto the case. Each blade has a row of spaced teeth having sharp cutting edges. The blades are on top of one another with the teeth aligned on the same side. The blades are operably connected to a motor which moves one or both blades laterally, side to side, in a reciprocating manner to produce a cutting effect on any fibers which come between the teeth.
The pair of shearing machines are in a position opposed to one another at a predetermined angle so that the outer blades of the shearing machines are substantially coplanar and so that the teeth of each shearing machine are aligned adjacent one another.
The device further includes a vacuum means for suction of cut fabrics and for drawing fabric in between the teeth of the blades.
The outer blades of the shearing machines produces a substantially flat surface, and fabrics having fibers desired to be cut are passed along the surface of the outer blades. Loose fibers are drawn between the teeth of the blades and cut by the reciprocating blades.
Although the present invention is briefly summarized, a fuller understanding of the invention can be obtained by the following drawings, the detailed description and appended claims.
REFERENCES:
patent: 238353 (1881-03-01), Coates
patent: 2088162 (1937-07-01), Cook
patent: 2356378 (1944-08-01), Capolupo
patent: 2360557 (1944-10-01), Freimark
patent: 2387579 (1945-10-01), Griffin et al.
patent: 2513119 (1950-06-01), Stout
patent: 2584620 (1952-02-01), Rubin
patent: 2950530 (1960-08-01), Fox
patent: 3279023 (1966-10-01), Zobel
patent: 5285558 (1994-02-01), Carder et al.
patent: 402061169 (1990-03-01), None
patent: 404034066 (1992-02-01), None
Kim & Lee
Noh Jerry H.
Vanatta Amy B.
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