Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Cutting and uniting cut parts
Patent
1996-04-05
2000-07-11
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Cutting and uniting cut parts
264248, 1563045, B29C 6502
Patent
active
060868066
ABSTRACT:
A method and apparatus are provided for forming a joint in an elongate article formed from a thermoplastic material, for example an escalator handrail or a conveyor belt, which also includes a plurality of reinforcing cables and a slider fabric. End parts of the article are held in a mold and heated to remelt the material. Portions adjacent the end parts are chilled, at ends of the mold, to prevent remelting. The molten end parts then fuse, and the molten joint is then cooled to resolidify the material and form the joint. With reinforcing cables being present, these can be cut into an interlace pattern, which advantageously is provided in just a layer of the article rather than extending through the full depth of the article. A top layer can then be replaced by a separate top cap of the material of the body of the article. Where a slider is present, to provide an effective interlacing effect, a bottom layer or portion of a handrail is cut at an inclined angle, to form an inclined joint in the slider.
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Elevator World, Patents, Dec. 1990 p.87.
Ball David S.
Ball Ronald H.
Caunce A. Stuart
Kenny Andrew O.
Weatherall Douglas J.
Ball Ronald H.
Lee Edmund H.
Silbaugh Jan H.
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