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(11) | EP 1 245 169 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Coil brush for forming rotary roll brush |
| (57) To prevent the peel-off of the winding end of a channel at the time a coil brush
is shaped by tightly spirally winding a channel brush, thereby obtaining an appropriate
abutment the winding end of the channel at the time a rotary roll brush is shaped
by externally fitting a plurality of coil brushes to the roll. A coil brush for forming
a rotary roll brush in which a coil brush 10 is formed by tightly spirally winding
a channel brush 7 which is formed by retaining a basal portion of a brush material
on a channel 1, a flange 11 is internally fitted to opposite ends of a cavity of the
coil brush10, and a roll insertion hole defined by an inner peripheral edge of the
flange 11 is formed in a central area of each flange11, wherein a plurality of projecting
pieces 15 are spacedly erected from an outer peripheral edge of each flange 11 towards
outside, each projecting piece 15 is welded to a bottom portion of the channel 1,
and one piece 15a of the projecting pieces is welded to a bottom portion in the vicinity
of an end face 1d of a winding end of each channel 1, or one side edge of the one
piece 15a of the projecting pieces is aligned with end faces 1d at the winding ends
of the channel 1 and welded. |