US3886645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding and assembling a hinged plastic container
Assignee: Plastic Forming Co Inc
•
Filing: 1973-06-13
•
Granted: 1975-06-03
•
Expires: 1993-06-13
Abstract
Abstract A method for forming a plastic container having integral hinge pin bearing portions of double wall thickness. A length of tubing is extruded and mold cavity sections are moved into engagement therewith to enclose a section of the tubing and to fold a portion of the tubing upon itself to form the double thickness bearing portion. The remainder of the enclosed tubing is expanded within the mold cavity sections to form the container part integral with the bearing portion. Separate parts are formed and assembled with a hinge pin.
Inventors
- 👤 Peter T Schurman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:45
CPC Classifications
B; B65; B65D; B65D43/00; B65D43/14; B65D43/16; B65D43/163; B65D43/164; B65D43/165; B29; B29C; B29C49/00; B29C49/0031; B65D2251/00; B65D2251/10; B65D2251/1016; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984; Y10T29/49861
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
The method of making a container having molded cover and body parts joined by a pinned hinge which comprises molding each of said parts by moving cavity-defining mold sections into engagement about a length of tubing of thermoplastic material, moving opposed portions of said tubing against each other and shaping said portions to form a hinge pin bearing wall portion having a wall thickness substantially twice that of said tubing and a hinge pin receiving wall portion adjacent the bearing wall portion, and expanding another portion of said tubing within the cavity to form the container part integral with said hinge portions, said parts being molded separately and thereafter assembled and the hinge portions of the body part being arranged to interfit the hinge portions of the cover part when said parts are assembled, assembling said cover and body parts, forming hinge pin receiving openings through said hinge pin receiving wall portions adjacent said bearing wall portions, and inserting a hinge pin through said openings in bearing relation to said bearing wall portions to join said parts in assembled hinged relation.
Claim 2
Independent Claim
181 words
The method of making a container having molded cover and body parts joined by a pinned hinge which comprises molding each of said parts by moving cavity-defining mold sections into engagement about a length of tubing of thermoplastic material, moving opposed portions of said tubing against each other and shaping said portions to form a hinge pin bearing wall portion having a wall thickness substantially twice that of said tubing and a hinge pin receiving wall portion adjacent the bearing wall portion, and expanding another portion of said tubing within the cavity to form the container part integral with said hinge portions, said parts being molded separately and thereafter assembled and the hinge portions of the body part being arranged to interfit the hinge portions of the cover part when said parts are assembled, assembling said cover and body parts, forming hinge pin receiving openings through said hinge pin receiving wall portions adjacent said bearing wall portions, and inserting a hinge pin through said openings in bearing relation to said bearing wall portions to join said parts in assembled hinged relation.
Claim 3
Independent Claim
181 words
The method of making a container having molded cover and body parts joined by a pinned hinge which comprises molding each of said parts by moving cavity-defining mold sections into engagement about a length of tubing of thermoplastic material, moving opposed portions of said tubing against each other and shaping said portions to form a hinge pin bearing wall portion having a wall thickness substantially twice that of said tubing and a hinge pin receiving wall portion adjacent the bearing wall portion, and expanding another portion of said tubing within the cavity to form the container part integral with said hinge portions, said parts being molded separately and thereafter assembled and the hinge portions of the body part being arranged to interfit the hinge portions of the cover part when said parts are assembled, assembling said cover and body parts, forming hinge pin receiving openings through said hinge pin receiving wall portions adjacent said bearing wall portions, and inserting a hinge pin through said openings in bearing relation to said bearing wall portions to join said parts in assembled hinged relation.
Claim 4
Independent Claim
181 words
The method of making a container having molded cover and body parts joined by a pinned hinge which comprises molding each of said parts by moving cavity-defining mold sections into engagement about a length of tubing of thermoplastic material, moving opposed portions of said tubing against each other and shaping said portions to form a hinge pin bearing wall portion having a wall thickness substantially twice that of said tubing and a hinge pin receiving wall portion adjacent the bearing wall portion, and expanding another portion of said tubing within the cavity to form the container part integral with said hinge portions, said parts being molded separately and thereafter assembled and the hinge portions of the body part being arranged to interfit the hinge portions of the cover part when said parts are assembled, assembling said cover and body parts, forming hinge pin receiving openings through said hinge pin receiving wall portions adjacent said bearing wall portions, and inserting a hinge pin through said openings in bearing relation to said bearing wall portions to join said parts in assembled hinged relation.
Claim 5
Dependent Claim
97 words
The method of claim 1 where one of said parts is shaped to form a pair of hinge pin receiving wall portions joined by such a hinge pin bearing wall portion extending therebetween, and the other of said parts is shaped to form a pair of spaced apart hinge pin receiving wall portions and a pair of such hinge pin bearing wall portions extending in opposite directions therefrom, the hinge pin bearing and receiving wall portions of the one part fitting between the hinge pin receiving wall portions of the other part when the parts are assembled.
Claim 6
Dependent Claim
23 words
The method of claim 1, wherein said hinge pin receiving wall portions also have a wall thickness substantially twice that of said tubing.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |