US3583820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing instruments
Assignee: PENN CORP
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Filing: 1969-06-30
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Granted: 1971-06-08
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Expires: 1989-06-30
Abstract
Abstract A writing instrument having a barrel and an ink cartridge shiftably mounted in the barrel and provided at one end with a writing tip. At its end, the barrel has longitudinally extending fingers which close upon themselves and completely shield the writing tip when the cartridge is in its retracted position. A camming surface on he cartridge engages inwardly projecting shoulders on the fingers and spreads the fingers as the cartridge moves to its extended position. An elastomeric band assists in urging the fingers together. A hood is mounted on the barrel and surrounds the fingers. The hood includes an opening to permit the extension of the writing tip.
Inventors
- 👤 Harold E Koeln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:37
CPC Classifications
B; B43; B43K; B43K7/00; B43K7/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
213 words
A writing instrument comprising a barrel having a bore extending longitudinally therethrough; a plurality of slits extending longitudinally inwardly from one end of said barrel, said slits defining a plurality of fingers which taper inwardly to form a nose portion at said one end of said barrel; said fingers having shoulders which protrude radially into said bore at a point between said one end of said barrel and the inner ends of said slits; said barrel, said fingers and said shoulders being of unitary construction; a cartridge shiftably mounted within said bore and including a writing tip and a camming surface; and a hood rigidly mounted on said barrel and surrounding said fingers, said hood having an opening in front of said nose portion; said cartridge beIng movable from a retracted position wherein its writing tip is within said barrel to an extended position wherein said writing tip protrudes axially beyond said fingers; said camming surface being positioned on said cartridge so that it engages said shoulders during movement of said cartridge to its extended position and spreads said fingers prior to the exit of said writing tip from said barrel; and bias means encircling and engaging the outer surfaces of said fingers to yieldably urge them radially inwardly into snug closure-forming relationship.
Claim 2
Dependent Claim
213 words
A writing instrument comprising a barrel having a bore extending longitudinally therethrough; a plurality of slits extending longitudinally inwardly from one end of said barrel, said slits defining a plurality of fingers which taper inwardly to form a nose portion at said one end of said barrel; said fingers having shoulders which protrude radially into said bore at a point between said one end of said barrel and the inner ends of said slits; said barrel, said fingers and said shoulders being of unitary construction; a cartridge shiftably mounted within said bore and including a writing tip and a camming surface; and a hood rigidly mounted on said barrel and surrounding said fingers, said hood having an opening in front of said nose portion; said cartridge beIng movable from a retracted position wherein its writing tip is within said barrel to an extended position wherein said writing tip protrudes axially beyond said fingers; said camming surface being positioned on said cartridge so that it engages said shoulders during movement of said cartridge to its extended position and spreads said fingers prior to the exit of said writing tip from said barrel; and bias means encircling and engaging the outer surfaces of said fingers to yieldably urge them radially inwardly into snug closure-forming relationship.
Claim 3
Dependent Claim
32 words
The writing instrument of claim 1 wherein space is provided between said hood and said fingers to permit said fingers to spread during the movement of said cartridge to its extended position.
Claim 4
Dependent Claim
32 words
The writing instrument of claim 1 wherein a bias means is mounted on the outside of said barrel and engages the outer surfaces of said fingers to yieldably urge them radially inwardly.
Claim 5
Dependent Claim
14 words
The writing instrument of claim 1 wherein said fingers are integral with said barrel.
Claim 6
Dependent Claim
69 words
The writing instrument of claim 1 wherein said hood is secured to said barrel at a point axially inwardly from said fingers and forms a smooth continuation of the outer surface of said barrel, said nose portion of said barrel being of reduced diameter with respect to the remainder of said barrel so that a space is formed between said nose portion and the inner surface of said hood.
Claim 7
Dependent Claim
21 words
The writing instrument of claim 1 wherein said hood includes an upper end which engages and is attached to said barrel.
Claim 8
Dependent Claim
49 words
The writing instrument of claim 6 wherein said barrel includes an upwardly presented annular shoulder and said upper end of said hood includes an annular rim having a diameter less than that of said shoulder, said rim being positioned above said shoulder to attach said hood to said barrel.
Claim 9
Dependent Claim
44 words
The writing instrument of claim 7 wherein said hood includes a plurality of slots therein positioned below said rim, portions of said shoulder protruding within said slots and engaging their upper ends to prevent said hood from coming off the end of said barrel.
References Cited (Backward Citations)
US1063134A
Cited
GB243110A
Cited
US1839817A
Cited
US1714965A
Cited
US2111767A
Cited
FR788722A
Cited
FR1424491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |