US3871048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush
Assignee: LENG ARMAC Ltd
•
Filing: 1973-08-16
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Granted: 1975-03-18
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Expires: 1993-08-16
Abstract
Abstract A brush is formed by a bundle of straight parallel extruded plastic filaments which project from one end portion of an extruded plastic sheath, the portion of the bundle within the sheath completely surrounding a wedge. The sheath is attached to a handle, and the filament bundle is suitably of generally rectangular cross-section, to produce a flat brush. The brush is made by continuously extruding a rope consisting of straight parallel filaments of a plastic material in a bundle around a continuously advanced core which is easily sectionable. Continuously extruded around the core and filament bundle is a sheath of plastic material. The rope is sectioned into predetermined lengths, and part of the sheath is stripped from each length to expose the filaments. The filament ends are anchored to the sheath and to one another, and the core is severed adjacent the mouth of the sheath, which is attached to the handle. The handle may instead be formed by shaping the end of the sheath remote from the filaments. The core is formed with locally weakened portions extending transversely of the length of the extruded rope, to facilitate severing of the core.
Inventors
- 👤 Monty Leigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:30
CPC Classifications
A; A46; A46B; A46B3/00; A46B3/08; A46B3/10; A46B3/12; Y; Y10; Y10S; Y10S15/00; Y10S15/04; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
43 words
A brush head formed by an extruded plastic sheath, a bundle of straight parallel extruded plastic filaments which project from one end portion of said extruded plastics sheath, and a wedge, the portion of the bundle within the sheath completely surrounding said wedge.
Claim 2
Dependent Claim
43 words
A brush head formed by an extruded plastic sheath, a bundle of straight parallel extruded plastic filaments which project from one end portion of said extruded plastics sheath, and a wedge, the portion of the bundle within the sheath completely surrounding said wedge.
Claim 3
Dependent Claim
23 words
A brush head as set forth in claim 1, in which said filament bundle is of generally rectangular flat, oval or round cross-section.
Claim 4
Dependent Claim
33 words
A brush head as set forth in claim 2, in which the inside surface of said sheath is formed with longitudinally extending ribs that extend into said filament bundle to locate said filaments.
Claim 5
Dependent Claim
33 words
A brush head as set forth in claim 1, in which the outside surface of said core is formed with longitudinally extending ribs that extend into said filament bundle to locate said filaments.
Claim 6
Dependent Claim
40 words
A brush head as set forth in claim 1, in which the inside surface of said sheath and the outside surface of said core are formed with longitudinally extending ribs that extend into said filament bundle to locate said filaments.
Claim 7
Independent Claim
92 words
A method of making a brush head, comprising the steps of: continuously extruding a rope consisting of straight parallel filaments of a plastic material in a bundle around a continuously advanced core which is easily sectionable; continuously extruding around said core and said filament bundle a sheath of plastic material; sectioning said rope into predetermined lengths; stripping away part of said sheath from each length to expose said filaments; anchoring the ends of said filaments to said sheath and to one another; and severing said core adjacent the mouth of said sheath.
Claim 8
Independent Claim
92 words
A method of making a brush head, comprising the steps of: continuously extruding a rope consisting of straight parallel filaments of a plastic material in a bundle around a continuously advanced core which is easily sectionable; continuously extruding around said core and said filament bundle a sheath of plastic material; sectioning said rope into predetermined lengths; stripping away part of said sheath from each length to expose said filaments; anchoring the ends of said filaments to said sheath and to one another; and severing said core adjacent the mouth of said sheath.
Claim 9
Dependent Claim
24 words
A method as set forth in claim 6, in which said filament bundle is of generally rectangular cross-section to provide a flat brush head.
Claim 10
Dependent Claim
17 words
A method as set forth in claim 7, in which said core is of generally rectangular cross-section.
Claim 11
Dependent Claim
26 words
A method as set forth in claim 6, in which said core is formed with locally weakened portions extending transversely of the length of said rope.
Claim 12
Dependent Claim
52 words
A method as set forth in claim 6, in which the unstripped portion of said sheath on each length is displaced away from the exposed filaments to leave an open ended hollow space within the sheath, before the ends of said filaments inside said sheath are bonded together and to said sheath.
Claim 13
Dependent Claim
36 words
A method as set forth in claim 6, in which longitudinally-extending ribs are formed by the extrusion process on the inside surface of said sheath, the ribs extending into the filament bundle to locate the filaments.
Claim 14
Dependent Claim
36 words
A method as set forth in claim 6, in which longitudinally-extending ribs are formed by the extrusion process on the outside surface of said core, the ribs extending into the filament bundle to locate the filaments.
Claim 15
Dependent Claim
43 words
A method as set forth in claim 6, in which longitudinally-extending ribs are formed by the extrusion process on the inside surface of said sheath and the outside surface of said core, the ribs extending into the filament bundle to locate the filaments.
Claim 16
Independent Claim
95 words
A method of making a brush, by: continuously extruding a rope consisting of straight parallel filaments of a plastic material in a bundle around a continuously advanced core which is easily sectionable; continuously extruding around said core and said filament bundle a sheath of plastic material; sectioning said rope into predetermined lengths; stripping away part of said sheath from each length to expose said filaments; anchoring the ends of said filaments to said sheath and to one another; severing said core adjacent the mouth of said sheath; and attaching a brush handle to said sheath.
Claim 17
Independent Claim
95 words
A method of making a brush, by: continuously extruding a rope consisting of straight parallel filaments of a plastic material in a bundle around a continuously advanced core which is easily sectionable; continuously extruding around said core and said filament bundle a sheath of plastic material; sectioning said rope into predetermined lengths; stripping away part of said sheath from each length to expose said filaments; anchoring the ends of said filaments to said sheath and to one another; severing said core adjacent the mouth of said sheath; and attaching a brush handle to said sheath.
Claim 18
Independent Claim
105 words
A method of making a brush, by: continuously extruding a rope consisting of straight parallel filaments of a plastic material in a bundle around a continuously advanced core which is easily sectionable; continuously extruding around said core and said filament bundle a sheath of plastic material; sectioning said rope into predetermined lengths; stripping away part of said sheath from each length to expose said filaments; anchoring the ends of said filaments to said sheath and to one another; severing said core adjacent the mouth of said sheath; inserting a brush handle into the open end of said sheath; and attaching said sheath to said handle.
Claim 19
Independent Claim
105 words
A method of making a brush, by: continuously extruding a rope consisting of straight parallel filaments of a plastic material in a bundle around a continuously advanced core which is easily sectionable; continuously extruding around said core and said filament bundle a sheath of plastic material; sectioning said rope into predetermined lengths; stripping away part of said sheath from each length to expose said filaments; anchoring the ends of said filaments to said sheath and to one another; severing said core adjacent the mouth of said sheath; inserting a brush handle into the open end of said sheath; and attaching said sheath to said handle.
Claim 20
Independent Claim
105 words
A method of making a brush, by: continuously extruding a rope consisting of straight parallel filaments of a plastic material in a bundle around a continuously advanced core which is easily sectionable; continuously extruding around said core and said filament bundle a sheath of plastic material; sectioning said rope into predetermined lengths; stripping away part of said sheath from each length to expose said filaments; anchoring the ends of said filaments to said sheath and to one another; severing said core adjacent the mouth of said sheath; and deforming the end of said brush-head remote from said protruding filaments to produce an integral brush handle.
Claim 21
Independent Claim
105 words
A method of making a brush, by: continuously extruding a rope consisting of straight parallel filaments of a plastic material in a bundle around a continuously advanced core which is easily sectionable; continuously extruding around said core and said filament bundle a sheath of plastic material; sectioning said rope into predetermined lengths; stripping away part of said sheath from each length to expose said filaments; anchoring the ends of said filaments to said sheath and to one another; severing said core adjacent the mouth of said sheath; and deforming the end of said brush-head remote from said protruding filaments to produce an integral brush handle.
Claim 22
Dependent Claim
49 words
A brush, comprising a brush head formed by an extruded plastic sheath, a bundle of straight parallel extruded plastic filaments which project from one end portion of said extruded plastics sheath, and a wedge, the portion of the bundle within the sheath surrounding said wedge, attached to a handle.
Claim 23
Dependent Claim
49 words
A brush, comprising a brush head formed by an extruded plastic sheath, a bundle of straight parallel extruded plastic filaments which project from one end portion of said extruded plastics sheath, and a wedge, the portion of the bundle within the sheath surrounding said wedge, attached to a handle.
Claim 24
Dependent Claim
40 words
A brush as set forth in claim 17, in which said sheath is hollow at the end opposite the protruding filaments and said handle is inserted into the hollow end of said sheath and said sheath fastened to said handle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |