US3578870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink writing instrument
Assignee: Uniline Corp
•
Filing: 1969-03-27
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Granted: 1971-05-18
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Expires: 1989-03-27
Abstract
Abstract An improved writing tip is provided for an ink pen particularly adapted for creating solid and relatively wide ink lines wherein an elongate porous ink-conducting nib for transferring ink between an ink cartridge and a writing end face of the nib is coaxially surrounded by an elongate hollow open ended housing with the nib writing face protruding from an end thereof. The nib is formed with a reduced cross section closely adjacent the writing face thereof to form a supplemental ink reservoir bounded by the housing and surrounding the porous nib closely adjacent the writing face for rapid and efficient transfer of the ink thereto and to provide a swivel mounting for the writing end of the nib for maintaining full face-to-face contact with the surface to be marked, and insuring uniformity of width of the ink line.
Inventors
- 👤 Florindo Viti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:02
CPC Classifications
B; B43; B43K; B43K8/00; B43K8/02; B43K8/026
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
In a pen, an ink-fed writing tip comprising: a tubular tip housing; a porous ink-conducting member mounted in said housing and having an end portion supported thereby with a writing, ink transfer surface protruding therefrom; said member being formed with a reduced cross-sectional portion relative to and contiguous with said end portion, said reduced portion cooperating with the interior wall of said housing to provide a free space ink reservoir for supplying ink to said surface.
Claim 2
Dependent Claim
76 words
In a pen, an ink-fed writing tip comprising: a tubular tip housing; a porous ink-conducting member mounted in said housing and having an end portion supported thereby with a writing, ink transfer surface protruding therefrom; said member being formed with a reduced cross-sectional portion relative to and contiguous with said end portion, said reduced portion cooperating with the interior wall of said housing to provide a free space ink reservoir for supplying ink to said surface.
Claim 3
Dependent Claim
53 words
A writing tip as defined in claim 1, said end portion surface protruding from the adjacent end of said housing and being formed with a substantially planar writing surface, and said member being formed of resiliently flexible material and said reduced portion being dimensioned to provide a swivel mounting for said end portion.
Claim 4
Dependent Claim
43 words
A writing tip as defined in claim 2, wherein said reduced portion is of annular form providing with said housing an annular ink reservoir surrounding said reduced portion and wherein the latter functions to provide a universal swivel support for said end portion.
Claim 5
Dependent Claim
47 words
A writing tip as defined in claim 3, wherein said end portion is of cylindrical form having a diameter larger than its axial length, and said housing is of cylindrical form coaxially surrounding said part over most of its axial length and terminating short of said surface.
Claim 6
Dependent Claim
40 words
A writing tip as defined in claim 4, said end portion and housing being spaced to provide an annular clearance therebetween facilitating flexure of said reduced portion and communicating with said reservoir to provide ink flow to said writing surface.
Claim 7
Dependent Claim
26 words
A writing tip as defined in claim 4, the end of said reduced portion contiguous with said part being of frustoconical form diverging to said part.
Claim 8
Dependent Claim
24 words
A writing tip as defined in claim 4, wherein the diameter of said reduced portion is approximately one-half of the diameter of said surface.
Claim 9
Dependent Claim
58 words
A writing tip as defined in claim 1, said member comprising, a section adapted for connection at one end to an ink supply and its opposite end being formed with an axially extending socket, and a second section having a relativEly enlarged head providing said writing surface and a relatively reduced axially extending stem mounted in said socket.
References Cited (Backward Citations)
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Cited
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US3418056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |