US3786755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic cartridge casing
Assignee: Remington Arms Co LLC
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Filing: 1971-11-18
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Granted: 1974-01-22
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Expires: 1991-11-18
Abstract
Abstract A method of making a one-piece plastic shotgun shell, i.e., where the transverse base portion is integral with the tubular body portion. A tubular plastic slug is carried progressively through a series of dies to produce a shotgun shell having a body portion which is highly oriented and a head section of somewhat lesser orientation. An oriented, integral primer gas seal skirt is formed inside the primer opening.
Inventors
- 👤 G Eckstein
- 👤 W Moyher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:08
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C33/00; B29C33/0033; B29C43/00; B29C43/02; B29C43/16; B29C55/00; B29C55/30; B29C57/00; B29C65/00; B29C65/56; B29C66/00; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5344; B29C66/61; B29C66/612; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; F; F42; F42B; F42B5/00; F42B5/26; F42B5/30; B29C2793/00; B29C2793/009; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29K; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/258; B29L; B29L2031/00; B29L2031/777; B29L2031/7772
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
A cartridge casing made of thermoplastic material having a tubular body portion and an integrally formed base section, a primer opening extending longitudinally through said base section, primer means positioned in said primer opening in close fitting relationship therewith, said opening being defined by a substantially cylindrical wall means which extends through said base section, and a gas sealing means located in said primer opening intermediate the ends thereof, said sealing means comprising an elongated seal which is buttrEssed substantially along its entire length by the base section of the cartridge casing when the primer is inserted into the primer opening, said gas sealing means comprising a continuous, annular skirt means formed integrally with said base section to project inwardly towards the center line of said primer opening when said primer is not in place and which is forced back against said base section to form a continuous surface with said cylindrical wall means when the primer means is in place.
Claim 2
Dependent Claim
161 words
A cartridge casing made of thermoplastic material having a tubular body portion and an integrally formed base section, a primer opening extending longitudinally through said base section, primer means positioned in said primer opening in close fitting relationship therewith, said opening being defined by a substantially cylindrical wall means which extends through said base section, and a gas sealing means located in said primer opening intermediate the ends thereof, said sealing means comprising an elongated seal which is buttrEssed substantially along its entire length by the base section of the cartridge casing when the primer is inserted into the primer opening, said gas sealing means comprising a continuous, annular skirt means formed integrally with said base section to project inwardly towards the center line of said primer opening when said primer is not in place and which is forced back against said base section to form a continuous surface with said cylindrical wall means when the primer means is in place.
Claim 3
Dependent Claim
155 words
A cartridge casing made of thermoplastic material having a tubular body portion and an integrally formed base section, a primer opening extending longitudinally through said base section, primer means positioned in said primer opening in close fitting relationship therewith, said opening being defined by a substantially cylindrical wall means which extends through said base section, and a gas sealing means located in said primer opening intermediate the ends thereof, said sealing means comprising an elongated seal which is buttressed substantially along its entire length by the base section of the cartridge casing when the primer is inserted into the primer opening, said gas sealing means comprising an annular skirt means integrally formed at its rear end to said base section and having its forward, free end projecting inwardly toward the center line of said primer opening thus forming a continuous groove means between the forward end of said skirt means and said cylindrical wall means.
Claim 4
Dependent Claim
155 words
A cartridge casing made of thermoplastic material having a tubular body portion and an integrally formed base section, a primer opening extending longitudinally through said base section, primer means positioned in said primer opening in close fitting relationship therewith, said opening being defined by a substantially cylindrical wall means which extends through said base section, and a gas sealing means located in said primer opening intermediate the ends thereof, said sealing means comprising an elongated seal which is buttressed substantially along its entire length by the base section of the cartridge casing when the primer is inserted into the primer opening, said gas sealing means comprising an annular skirt means integrally formed at its rear end to said base section and having its forward, free end projecting inwardly toward the center line of said primer opening thus forming a continuous groove means between the forward end of said skirt means and said cylindrical wall means.
Claim 5
Dependent Claim
57 words
A cartridge casing as recited in claim 2 in which said annular skirt means is so positioned that the forward end of the primer means, when in place, extends past the forward, free end of said skirt means so that the entire skirt means is forced between the primer means and the base section of the cartridge.
Claim 6
Dependent Claim
134 words
A cartridge casing made of thermoplastic material having a tubular body portion and an integrally formed base section, a primer opening extending longitudinally through said base section, primer means positioned in said primer opening in close fitting relationship therewith, said opening being defined by a substantially cylindrical wall means which extends through said base section, and a gas sealing means located in said primer opening intermediate the ends thereof, said sealing means comprising an elongated seal which is buttressed substantially along its entire length by the base section of the cartridge casing when the primer is inserted into the primer opening, said gas sealing means comprising a continuous, annular skirt means integrally formed with said base section and whose plastic material has been substantially deformed and whose crystalline structure is at least moderately oriented.
Claim 7
Dependent Claim
134 words
A cartridge casing made of thermoplastic material having a tubular body portion and an integrally formed base section, a primer opening extending longitudinally through said base section, primer means positioned in said primer opening in close fitting relationship therewith, said opening being defined by a substantially cylindrical wall means which extends through said base section, and a gas sealing means located in said primer opening intermediate the ends thereof, said sealing means comprising an elongated seal which is buttressed substantially along its entire length by the base section of the cartridge casing when the primer is inserted into the primer opening, said gas sealing means comprising a continuous, annular skirt means integrally formed with said base section and whose plastic material has been substantially deformed and whose crystalline structure is at least moderately oriented.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |