Apparatus and methodology for producing rounded brush tips

Brush – broom – and mop making – Brush-making machines – Work holders

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300 21, 432124, A46D 108

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active

049987798

ABSTRACT:
Apparatus and methodology for rounding the bristle tips of twisted wire brushes. Each twisted wire brush is mounted in a carrier by means of a spindle which permits the brush to be rotated along its longitudinal axis. The melting of the synthetic bristle tips takes place in a heated chamber which includes one or more heated cylindrical cavities which may extend over a portion or the whole of the length of each brush. When the carrier approaches the chamber, the chamber is lowered over the carrier so that each of the individual brushes is inserted into a heated cavity. When inserted in the cavity, the brush is rotated on the spindle while it is heated. The rotation and heating causes the individual bristle tips to melt into a rounded ball without adhering to each other. Thereafter, the heating chamber is raised, the carrier is indexed, and the process is repeated.

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patent: 4030158 (1977-06-01), Blair et al.
patent: 4606723 (1986-08-01), Pasternicki
patent: 4619012 (1986-10-01), Wachtel
patent: 4635659 (1987-01-01), Spatz
patent: 4762373 (1988-08-01), Amos et al.
patent: 4927281 (1990-05-01), Gueret

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