Method and device for producing brushes and brushes produced using the same
First Claim
1. A method for the manufacture of brushes having a plastic bristle carrier and a bristle stock of individual or bundled plastic bristles fastened thereto, the method comprising the steps of:
- a) melting fastening-sided ends of the bristles or bundles into thickenings;
b) shaping and displacing plastic material of at least a portion of said thickenings in a mold to create at least a partial support structure web connecting together adjacent thickenings; and
c) embedding said thickenings and said web through a short length in plastics material of said bristle carrier.
6 Assignments
0 Petitions
Accused Products
Abstract
A method for the manufacture of brushes with a plastic bristle carrier and a bristle configuration of individual or bundlewise-combined plastic bristles is proposed, in that the fastening-side ends of the bristles or bundles are melted to a thickening, thickenings of adjacent bristles or bundles are interconnected by after shaping and displacement of the plastics material and the connections are subsequently embedded in the plastics material of the bristle carrier. The thickenings are shaped by means of a mold to a clearly defined support structure of webs connecting adjacent thickenings and subsequently the support structure and the bristles projecting over the same are embedded by a short length in the plastics material of the bristle carrier. An apparatus for performing such a method and a brush manufactured by such a method are also proposed.
60 Citations
25 Claims
-
1. A method for the manufacture of brushes having a plastic bristle carrier and a bristle stock of individual or bundled plastic bristles fastened thereto, the method comprising the steps of:
-
a) melting fastening-sided ends of the bristles or bundles into thickenings;
b) shaping and displacing plastic material of at least a portion of said thickenings in a mold to create at least a partial support structure web connecting together adjacent thickenings; and
c) embedding said thickenings and said web through a short length in plastics material of said bristle carrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
a mounting support having channels for receiving the bristles or bristle bundles of a complete bristle stock of a toothbrush;
means for supplying the bristles or bristle bundles into said channels to a position in which their fastening-sided ends project past the mouths of said channels;
means for melting said fastening-side ends; and
a shaping device having a male die associated with each thickening for lateral displacement of plastics material of said thickenings and at least one shaping unit located between said male dies for shaping said displaced plastics material into connections between said thickenings for forming said support structure web.
-
-
16. The apparatus of claim 15, wherein said shaping device comprises at least one closing unit having structures projecting past and between said male dies, said closing unit for placement on said mounting support to form plastic-free spaces between said dies.
-
17. The apparatus of claim 16, wherein said closing unit, said male dies and said shaping unit are portions of a one-piece mold.
-
18. The apparatus of claim 15, wherein at least the closing unit has structures in advance of said male dies and said shaping unit.
-
19. The apparatus of claim 18, wherein said male dies and said shaping unit are mutually integral.
-
20. The apparatus of claim 15, wherein said male dies and said shaping unit can be separately controlled.
-
21. The apparatus of claim 15, wherein, at least in predetermined areas, a shaping face of said shaping unit has structures which are retracted relative to a shaping faces of said male dies.
-
22. The apparatus of claim 15, wherein said mounting support having said channels receiving the bristles or bristle bundles simultaneously serves as an abutment for said shaping device.
-
23. The apparatus of claim 15, wherein said shaping device is at least zonally provided with a heating device.
-
24. The apparatus of claim 15, wherein said mounting support with said channels receiving the bristles or bristle bundles simultaneously forms part of a mold for said bristle carrier and, during a filling of said mold, shapes said bristle carrier at a bristle configuration side thereof.
-
25. The apparatus of claim 15, wherein the bristles or bristle bundles are displaceable in the mounting support in a direction of said thickenings to adjust said thickenings in a mold to a desired embedding depth in said bristle carrier.
-
13. A method for the manufacture of brushes having a plastic bristle carrier and a bristle stock of individual or bundled plastic bristles fastened thereto, the method comprising steps of:
-
a) melting fastening-sided ends of the bristles or bundles into thickenings;
b) joining a support structure web onto at least a portion of said thickenings to cover thickenings and to connect together adjacent thickenings; and
c) embedding said thickenings and said web through a short length in plastics material of said bristle carrier. - View Dependent Claims (14)
-
Specification