Patent US2078221A successfully refreshed from Google Patents.
US4938539A
Expired / Lapsed
US
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Process for producing a toothbrush and toothbrushes produced by the process
Assignee: Individual
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Filing: 1989-07-24
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Granted: 1990-07-03
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Expires: 2009-07-24
Abstract
Abstract A toothbrush blank having a handle, a pair of head portions provided with a plurality of bristles receiving bores on one side of the head portions, and a narrow hinge-forming V-shaped cavity or groove formed on the same bristle receiving side of the head portions. The V-shaped groove enables the head portions to be bent in a convex arch so that the bristles can be cut and polished in a common plane. Thereafter, the head portions are bent towarad each other into a finished condition where the side surfaces of the V-shaped groove form support abutments which are glued or welded against each other.
Inventors
- 👤 Rolf Barman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:02
CPC Classifications
A; A46; A46D; A46D9/00; A46B; A46B5/00; A46B5/0004; A46B5/0012; A46B5/002; A46B5/0025; A46B2200/00; A46B2200/10; A46B2200/1066
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
A process of producing a toothbrush comprising the steps of providing a toothbrush blank having a pair of parallel head portions, a common handle and groups of bristles in upstanding relation in each head portion; bending the head portions about a central axis of the handle to position the head portions at a first angle greater than 180° relative to each other; cutting the upstanding bristles simultaneously in a common plane; and thereafter bending the head portions toward each other to define a second angle therebetween less than said first angle with the bristles of the head portion angularly inclined toward each other.
Claim 2
Dependent Claim
103 words
A process of producing a toothbrush comprising the steps of providing a toothbrush blank having a pair of parallel head portions, a common handle and groups of bristles in upstanding relation in each head portion; bending the head portions about a central axis of the handle to position the head portions at a first angle greater than 180° relative to each other; cutting the upstanding bristles simultaneously in a common plane; and thereafter bending the head portions toward each other to define a second angle therebetween less than said first angle with the bristles of the head portion angularly inclined toward each other.
Claim 3
Dependent Claim
48 words
A process as set forth in claim 1 wherein the blank has a narrowed transition portion between the head portions with a V-shaped cavity on one side and which further comprises the step of closing said cavity during said step of portions together thereat into a permanent union.
Claim 4
Dependent Claim
21 words
A process as set forth in claim 1 wherein the bristles are cut in a plane perpendicular to said central axis.
Claim 5
Dependent Claim
61 words
A process as set forth in claim 1 wherein the bristles are cut in a plane oblique to said central axis to form the shortest bristle length at a distal end of a head portion and closest to said central axis and to form the longest bristle length at proximal end of a head portion and farthest from said central axis.
References Cited (Backward Citations)
US4449266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-02 | 1994-01-01 | 1994-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-02 | 1998-01-01 | 1998-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-02 | 2002-01-01 | 2002-07-03 | $7700.00 | Window Closed / Lapsed |