Brakes – Elements – Shoes
Reexamination Certificate
1999-04-08
2001-05-15
Schwartz, Christopher P. (Department: 3613)
Brakes
Elements
Shoes
Reexamination Certificate
active
06230857
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a device to substantially reduce or eliminate brake squeal of a brake when applying tension to an industrial continuous material, for example: a paper web, wire, etc. from an unwind stand of an industrial process machine for example: a printing press, coating machine, etc. and, more particularly, to a friction pad having a backplate structure to eliminate that squeal.
BACKGROUND OF THE INVENTION
In printing press operations a variety of pneumatic brakes have been employed in an unwind stand of the press. Such brakes may be standard dual disc brakes, universal actuator brakes, single disc brakes, pod-style brakes, and caliper brakes. Typically, these brakes, when used to brake an unwinding roll of paper installed on the unwind stand, squeal adding noise to the surrounding environment making conservation difficult and operator discomfort a problem.
Therefore what is needed is a friction pad that reduces squeal to minimize noise pollution, resulting from such brakes, in the environment surrounding a printing press.
SUMMARY OF THE INVENTION
Wherefore, it is an object of the present invention to overcome the aforementioned problems and drawbacks associated with the prior art designs.
One object of the invention is to provide a friction pad that reduces brake squeal in printing press environs.
Another object of the invention is to improve safety and fatigue of a printing press operators by providing squeal free brake-pads to reduce environmental noise and pollution.
According to the invention, there is provided an anti-squeal friction pad assembly, for an unwind stand tension brake of a printing press, comprising: a backplate having a mounting surface, a pad support body having a brake pad attached thereto, said support body being fast with said mounting surface at discrete locations of said support body.
Also according to the invention there is provided an unwind stand of a printing press having a tension disk brake including an anti-squeal friction pad assembly; the assembly comprising; a backplate having a mounting surface, a pad support body having a brake pad attached thereto, said support body being fast with said mounting surface at discrete locations of said support body.
REFERENCES:
patent: 5518088 (1996-05-01), Brosilow
patent: 5706917 (1998-01-01), Matsuzaki
patent: 5842546 (1998-12-01), Biswas
Bartz C. T.
Davis & Bujold P.L.L.C.
Dover Flexo Electronics, Inc.
Schwartz Christopher P.
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