US3995984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Matching dies for composite cored structures
Assignee: EP INDUSTRIES Inc
•
Filing: 1975-02-10
•
Granted: 1976-12-07
•
Expires: 1995-02-10
Abstract
Abstract A pair of matched metal dies one of which moves against the other to form a mold to contain, and to apply pressure to a part and to pinch off excess material on the part. The lower die has a recess with all the sides of the recess canted outward in two steps. The upper die when inserted contacts the lower canted sides of the lower die.
Inventors
- 👤 William H. Fetherston
- 👤 Roger C. Teeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:31
CPC Classifications
B; B63; B63B; B63B32/00; B63B32/57; A; A63; A63C; A63C5/00; A63C5/12; B29; B29C; B29C43/00; B29C43/32; B29C43/36; B29C43/40; B29C63/00; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/46; B29C70/68; B29C70/86; B29C70/865; B29D; B29D24/00; B29D24/002; B29D24/005; B29D24/007; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B27/00; B32B27/06; B32B27/065; B32B3/00; B32B3/02; B32B3/04; B32B3/10; B32B3/12; B32B5/00; B32B5/18; B63B32/59; B29K; B29K2105/00; B29K2105/04; B29K2705/00; B29K2705/02; B29K2711/00; B29K2711/14; B29L; B29L2031/00; B29L2031/52; B29L2031/5263; B32B2260/00; B32B2260/04; B32B2260/046; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2305/00; B32B2305/08; Y; Y10; Y10S; Y10S425/00; Y10S425/005; Y10S425/042; Y10S425/047; Y10S425/805; Y10S425/809; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
A pair of movable matched metal dies, for one step molding of a structural part having a core and a reinforcing cover, for use in a compression molding press the matched metal dies comprising: a lower die having a recess shaped to define the bottom and sides of a structural part; a cant extending upwardly and outwardly on all sides of the recess; an upper die extending downwardly into the recess of the lower die to contact the canted sides of the recess and to define the upper surface of a structural part, said downwardly extending upper die having sides extending at an angle of between two and ten degrees to the canted sides of the recess; and the lower die having a sharply increased outwardly extending angle to the canted sides of the recess starting on a line at least one quarter inch above the line of contact between the upper and lower dies.
Claim 2
Dependent Claim
155 words
A pair of movable matched metal dies, for one step molding of a structural part having a core and a reinforcing cover, for use in a compression molding press the matched metal dies comprising: a lower die having a recess shaped to define the bottom and sides of a structural part; a cant extending upwardly and outwardly on all sides of the recess; an upper die extending downwardly into the recess of the lower die to contact the canted sides of the recess and to define the upper surface of a structural part, said downwardly extending upper die having sides extending at an angle of between two and ten degrees to the canted sides of the recess; and the lower die having a sharply increased outwardly extending angle to the canted sides of the recess starting on a line at least one quarter inch above the line of contact between the upper and lower dies.
Claim 3
Dependent Claim
138 words
A pair of movable matched metal dies, for use in a compression molding press, for one step compression molding of a structural part having a core and a reinforcing cover, the matched metal dies comprising; a lower die having a cavity with all sides canting downwardly and inwardly in two steps to include upper canted sides having a wide angle to vertical and lower canted sides at an angle of from between two and ten degrees from the vertical; and an upper die extending essentially vertically downward to form a mold in conjunction with the lower die and to make line of contact with the lower canted sides of the cavity of the lower die along a line at least one quarter inch below the line formed by the junction of the two stepped sides of the cavity.
Claim 4
Dependent Claim
138 words
A pair of movable matched metal dies, for use in a compression molding press, for one step compression molding of a structural part having a core and a reinforcing cover, the matched metal dies comprising; a lower die having a cavity with all sides canting downwardly and inwardly in two steps to include upper canted sides having a wide angle to vertical and lower canted sides at an angle of from between two and ten degrees from the vertical; and an upper die extending essentially vertically downward to form a mold in conjunction with the lower die and to make line of contact with the lower canted sides of the cavity of the lower die along a line at least one quarter inch below the line formed by the junction of the two stepped sides of the cavity.
Claim 5
Dependent Claim
136 words
A pair of movable matched metal dies, for one step molding of a structural part having a core and a reinforcing cover for use in a compression molding press wherein the matched metal dies comprise: a lower die having a recess wherein all sides of the recess cant outwardly and upwardly for a distance at least one quarter inch above a line defined by an upper edge of an outer side of a part formed in the die thence all sides extend outwardly and upwardly at a more widely diverging angle, and an upper die downwardly extending to contact the lower canted sides of the lower die when fully inserted wherein sides of the upper die extend at an angle of between 2° and 10° with respect to the lower canted sides of the lower die.
Claim 6
Dependent Claim
136 words
A pair of movable matched metal dies, for one step molding of a structural part having a core and a reinforcing cover for use in a compression molding press wherein the matched metal dies comprise: a lower die having a recess wherein all sides of the recess cant outwardly and upwardly for a distance at least one quarter inch above a line defined by an upper edge of an outer side of a part formed in the die thence all sides extend outwardly and upwardly at a more widely diverging angle, and an upper die downwardly extending to contact the lower canted sides of the lower die when fully inserted wherein sides of the upper die extend at an angle of between 2° and 10° with respect to the lower canted sides of the lower die.
References Cited (Backward Citations)
US3244782A
Cited
US3256375A
Cited
US3200465A
Cited
US3564602A
Cited
US3324511A
Cited
US3447205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |