Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Forming continuous work followed by cutting
Patent
1980-07-03
1982-04-20
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Forming continuous work followed by cutting
264157, 264167, 264174, 264243, 264295, 300 21, B29D 3100
Patent
active
043259022
ABSTRACT:
Methods of manufacturing brush components are disclosed in which a plurality of predetermined lengths of brush bristle formed of synthetic resinous material are fed from a supply into the nip of at least one pair of endless haul-off belts so that the bristles are arranged substantially uniformly and parallel to each other with their ends in line. In one construction a single pair of haul-off belts having a width which is less than the bristles is used, the bristles projecting beyond the sides of the belts, and the thus formed bristle array is fed into an extruder whereupon a plastics material is extruded over the projecting ends of the bristles to hold them together and/or the ends are fused together, the resultant product, on emerging from the ends of the belts, then being slit centrally to provide two endless components. In another construction, two spaced pairs of belts are used to advance the bristles into an extruder and plastics material is extruded down the center of the bristles either from each side or in sufficient amounts to penetrate between the bristles completely, whereupon on emerging from the belts the bristles are either folded about the central extrusion through 180.degree., whereupon the extrusion is allowed to cool, or are slit centrally of the extrusion to provide two components. In all the constructions, the bristles are heated prior to or during the extrusion, and hence soften or are fused together.
REFERENCES:
patent: 2294480 (1942-09-01), Rohweder et al.
patent: 2363685 (1944-11-01), Neuschaefer
patent: 2812214 (1957-11-01), Sandelin
patent: 2980467 (1961-04-01), Lichene
patent: 3351387 (1967-11-01), Lichene
patent: 4133147 (1979-01-01), Swift
Lowe James B.
Schlegel (UK) Limited
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