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Patent US3969027A successfully refreshed from Google Patents.
US3969027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instrument
Assignee: Gillette Co LLC
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Filing: 1975-04-03
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Granted: 1976-07-13
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Expires: 1995-04-03
Abstract
Abstract Relates to a pocket-type writing instrument, employing an extruded rod-like writing element composed of a homogeneous thermoplastic composition having a formation of longitudinally extending ink-conducting channels around an axial channel, one end of said element constituting the writing point and the other being in contact with a body of ink, usually carried in an absorbent material contained in the barrel of the pen. Provides novel means for preventing axial displacement of the writing element without damage to or constriction of the ink channels therein and without the use of wire pins which may interfere with the ease of handling of the instrument.
Inventors
- 👤 George Andrew Randar
- 👤 Harris William Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:36
CPC Classifications
B; B43; B43K; B43K1/00; B43K1/003; B43K8/00; B43K8/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
304 words
In a writing instrument having a main hollow barrel portion containing an absorbent ink-impregnated filler and a tapering frontal barrel portion providing an external elongated finger positioning surface area, the improvement comprising the provision of: said tapering frontal barrel portion being so provided as to be resiliently deformable radially outwardly of an axial bore thereof; locking shoulder means formed in said frontal barrel portion at the frontal entrance to said bore for presenting a pair of inwardly extending shoulders facing in opposing axial directions; and an elongated writing element being relatively non-deformable relative to said frontal barrel portion and composed of a homogenous thermoplastic polymeric composition, including a shank having a frusto-conical frontal portion terminating in a contoured writing tip surface, and a rear end surface, an axial channel for conveying liquid, a plurality of liquid conducting channels radially extending therefrom, all of said channels extending from said rear surface to and terminating within the contoured writing tip surface, and a circumferential groove with oppositely facing walls formed in the shank at a predetermined distance from the frusto-conical portion and contoured tip surface, said groove being adapted to receive the locking shoulder means when the frontal barrel portion is temporarily deformed radially outwardly by the element being inserted into the axial bore of the tapering frontal barrel portion until said shoulder means fits into said groove, the locking shoulder means being then retained in the groove by the resilience of the frontal barrel portion, a constrictive effect thereof being absorbed by a continuous layer of thermoplastic polymer composition over the array of radial liquid-conducting channels, the element being thereby restrained from axial displacement in said bore under shock and writing pressure without constriction or impairment of said channels or variation in relative spatial position of said contoured writing tip surface and finger positioning area.
Claim 2
Dependent Claim
304 words
In a writing instrument having a main hollow barrel portion containing an absorbent ink-impregnated filler and a tapering frontal barrel portion providing an external elongated finger positioning surface area, the improvement comprising the provision of: said tapering frontal barrel portion being so provided as to be resiliently deformable radially outwardly of an axial bore thereof; locking shoulder means formed in said frontal barrel portion at the frontal entrance to said bore for presenting a pair of inwardly extending shoulders facing in opposing axial directions; and an elongated writing element being relatively non-deformable relative to said frontal barrel portion and composed of a homogenous thermoplastic polymeric composition, including a shank having a frusto-conical frontal portion terminating in a contoured writing tip surface, and a rear end surface, an axial channel for conveying liquid, a plurality of liquid conducting channels radially extending therefrom, all of said channels extending from said rear surface to and terminating within the contoured writing tip surface, and a circumferential groove with oppositely facing walls formed in the shank at a predetermined distance from the frusto-conical portion and contoured tip surface, said groove being adapted to receive the locking shoulder means when the frontal barrel portion is temporarily deformed radially outwardly by the element being inserted into the axial bore of the tapering frontal barrel portion until said shoulder means fits into said groove, the locking shoulder means being then retained in the groove by the resilience of the frontal barrel portion, a constrictive effect thereof being absorbed by a continuous layer of thermoplastic polymer composition over the array of radial liquid-conducting channels, the element being thereby restrained from axial displacement in said bore under shock and writing pressure without constriction or impairment of said channels or variation in relative spatial position of said contoured writing tip surface and finger positioning area.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |