Brush – broom – and mop making – Brush-making machines – Tuft feeding and setting
Patent
1977-08-26
1979-01-02
Custer, Jr., Granville Y.
Brush, broom, and mop making
Brush-making machines
Tuft feeding and setting
300 21, A46D 108
Patent
active
041324498
ABSTRACT:
A method and an apparatus for joining plastic brush bristles with plastic brush backs provides for heating the tips of brush bristle strands until they are soft and heating zones of the plastic brush backs to which the bristles will be mounted until they are soft. Thereafter, the soft tips of the bristles are brought into contact with the soft zones of the brush backs to fuse the bristles to the brush backs. In the particular structure and method of the machine of this invention, two relatively movable plates alternately clamp to and unclamp from indeterminant-length bristle strands to jog the strand ends into contact with the brush backs. One of the plates carries a cutting blade which cuts the strands into bristle lengths once their tips are fastened to the brush backs. For the heating step, expandable heating plates are moved between the brush backs and the bristle strand tips and expanded to contact the bristle strand tips and the brush backs and are then contracted and retracted from between the bristles and the brush backs.
REFERENCES:
patent: 2664316 (1953-12-01), Winslow, Jr. et al.
patent: 3408112 (1968-10-01), Piotrowski
patent: 3910637 (1975-10-01), Lewis, Jr.
Blair Tool & Machine Corporation
Custer, Jr. Granville Y.
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