US4008302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding plastic elements on a continuous web
Assignee: Polaroid Corp
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Filing: 1972-12-26
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Granted: 1977-02-15
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Expires: 1992-12-26
Abstract
Abstract A continuous web of identical plastic parts is produced by molding a first unit comprising at least one of such parts in a mold, and connecting such molded part(s) to subsequent molded parts, by means of at least one runner upon which all the parts comprising the web are molded. The runner(s) connecting the parts may include indicia of data such as, indexing, information, part treatment information, assembly information, inventory information, etc.
Inventors
- 👤 Irving Erlichman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:53
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/14; B29C45/14549; B29C45/14565; Y; Y10; Y10S; Y10S425/00; Y10S425/034; Y10T; Y10T29/00; Y10T29/49; Y10T29/49764; Y10T29/49778
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
A method for forming a continuous web comprising plastic molded elements comprising: inserting into a mold comprising a cavity a forward portion of at least one continuous runner element; causing a section of said runner element to traverse a part of the mold cavity and protrude from the mold; injecting into the mold cavity a liquid material capable of being cured to form a solid; curing said liquid material in said mold cavity whereby the cured material is secured to the runner section in said mold cavity; opening said mold and applying sufficient force to said runner to cause the molded part secured thereto to be ejected from the mold; concomitantly positioning a subsequent portion of said continuous runner element in said cavity; and closing the mold and repeating the molding and ejection cycle whereby a web comprising molded plastic parts secured to at least one continuous runner element is formed.
Claim 2
Independent Claim
151 words
A method for forming a continuous web comprising plastic molded elements comprising: inserting into a mold comprising a cavity a forward portion of at least one continuous runner element; causing a section of said runner element to traverse a part of the mold cavity and protrude from the mold; injecting into the mold cavity a liquid material capable of being cured to form a solid; curing said liquid material in said mold cavity whereby the cured material is secured to the runner section in said mold cavity; opening said mold and applying sufficient force to said runner to cause the molded part secured thereto to be ejected from the mold; concomitantly positioning a subsequent portion of said continuous runner element in said cavity; and closing the mold and repeating the molding and ejection cycle whereby a web comprising molded plastic parts secured to at least one continuous runner element is formed.
Claim 3
Dependent Claim
13 words
The invention of claim 1 wherein said runner comprises a continuous paper web.
Claim 4
Dependent Claim
13 words
The invention of claim 1 wherein said runner comprises a continuous plastic web.
Claim 5
Dependent Claim
13 words
The invention of claim 1 wherein said runner comprises a continuous metallic web.
Claim 6
Dependent Claim
12 words
The invention of claim 1 wherein said runner comprises a magnetic tape.
Claim 7
Dependent Claim
29 words
The invention of claim 1 wherein said runner comprises stored information capable of detection and stimulating the performance of desired functions at least with respect to said molded parts.
Claim 8
Dependent Claim
17 words
The invention of claim 1 wherein indicia of information is imparted to said runner by said mold.
Claim 9
Dependent Claim
22 words
The invention of claim 7 wherein said indicia of information is imparted by mold means which perforate the runner during mold closure.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |