Abstract: A cylindrical brush is formed to have multiple interfitting and interconnected sections which may consist of synthetic resin; holes are controllably and automatically drilled in the sections in selected patterns so that bristles may be filled into certain holes to be retained by staples; other holes may be controllably drilled into the sections and shaped to supply fluid radially outwardly for cleaning bristles or for cleaning work, or drying or waxing same; holes may be formed at telescoping end extent of the sections; bristles may be anchored by staples with legs deflected by a mandrel or shaft; and staples may act to lock telescoping sections of a sleeve or core, assisted by bonding of the plastic sections.

Abstract: A cylindrical brush is formed to have multiple interfitting and interconnected sections which may consist of synthetic resin; holes are controllably and automatically drilled in the sections in selected patterns so that bristles may be filled into certain holes to be retained by staples; other holes may be controllably drilled into the sections and shaped to supply fluid radially outwardly for cleaning bristles or for cleaning work, or drying or waxing same; holes may be formed at telescoping end extents of the sections; bristles may be anchored by staples with legs deflected by a mandrel or shaft; and staples may act to lock telescoping sections of a sleeve or core, assisted by bonding of the plastic sections.

Abstract: A brush filling process employs longitudinally axially spaced rotary heads, and a core and includes the steps:(a) releasably coupling three of the brush cores to two of the heads, with the cores spaced about the axis,(b) rotating at least one of the heads about the axis, to rotate the cores between three index positions,(c) forming bristle receiving holes in a core at one of the positions,(d) filling bristles into the holes at a second of the positions, and(e) trimming the filled bristles at a third of the positions.

Abstract: Brush filling apparatus comprising(a) longitudinally axially spaced rotary heads,(b) first structure to releasably couple three longitudinally extending brush cores to two of the heads, with the cores spaced about the axis,(c) second structure to rotate at least one of the heads about the axis, to rotate the cores between three index positions,(d) third structure to drill bristle receiving holes in a core at one of the positions,(e) fourth structure to fill bristles into the holes at a second of the positions, and(f) fifth structure to trim the filled bristles at a third of the positions.