Method for producing brushes with flexible bristles and brushes with stiff bristles

A method of attaching a plurality of bristles of substantially equal length in a receptacle on a brush body, utilizing an insert element and a receiving body, so as to provide a brush with bristles extending from the brush body by preselected, irregular distances, said method comprising the steps of:

• (a) contacting the receiving body with first ends of the plurality of bristles, the receiving body having a contour corresponding with the preselected distances, so as to cause second ends of the bristles to have the corresponding contour;
• (b) contacting the receiving body with the insert element;
• (c) subjecting the insert element to energy to heat the insert element so as to soften the receiving body;
• (d) cooling the insert element to harden the receiving body so as to attach the receiving body to the bristle first ends and the insert element;
• (e) inserting the insert element into the receptacle;
• and
• (f) attaching the insert element in the receptacle.

A method of attaching a plurality of bristles of substantially equal length on a brush body utilizing an insert element so as to provide a brush with bristles extending from the brush body by preselected, irregular distances, said method comprising the steps of:

• (a) forming in the brush body at least one receptacle having a surface with a contour corresponding with the preselected, irregular distances;
• (b) inserting the insert element into the receptacle, the insert element having substantially the corresponding contour;
• (c) contacting the insert element with first ends of the plurality of bristles to cause second ends of the bristles to have the corresponding contour;
• (d) subjecting the insert element to energy to heat the insert element so as to soften the bristle first ends;
• (e) cooling the insert element to harden the bristle first ends so as to attach the bristle first ends to the insert element;
• and
• (f) attaching the insert element in the receptacle.