US3918863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One step dual foam crash pad mold assembly
Assignee: Davidson Rubber Co Inc
•
Filing: 1974-04-17
•
Granted: 1975-11-11
•
Expires: 1994-04-17
Abstract
Abstract The instant invention relates to a mold and a method used therewith for manufacturing multi-density foamed articles such as dual foam crash pads of the type used in automobiles in a one step operation which includes providing divider means disposed in a mold cavity for dividing the mold cavity into at least two sections whereby a first foamable material may be injected into a first section while substantially simultaneously injecting a second foamable material into a second section.
Inventors
- 👤 Jr Richard D Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:21
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/04; B29; B29C; B29C33/00; B29C33/0061; B29C33/0066; B29C44/00; B29C44/02; B29C44/04; B29C44/0461; B29C44/0469
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
A mold assembly of the type used to manufacture multi-density foamed articles comprising; a body member and a cover member defining a mold cavity, said members being movable between open and closed positions for opening and closing said cavity, a nondistortable sheet disposed within said mold cavity for dividing said mold cavity into at least two sections, said sheet being removably attached to one of said members for being removed from said mold cavity with a foamed article, said sheet being suspended from its extremities and extending centrally through said cavity in spaced relationship to said members whereby said sheet is suspended within said cavity, and passage means in communication with each of said sections whereby foamable materials may be injected substantially simultaneously into each of said sections while maintained separated.
Claim 2
Dependent Claim
131 words
A mold assembly of the type used to manufacture multi-density foamed articles comprising; a body member and a cover member defining a mold cavity, said members being movable between open and closed positions for opening and closing said cavity, a nondistortable sheet disposed within said mold cavity for dividing said mold cavity into at least two sections, said sheet being removably attached to one of said members for being removed from said mold cavity with a foamed article, said sheet being suspended from its extremities and extending centrally through said cavity in spaced relationship to said members whereby said sheet is suspended within said cavity, and passage means in communication with each of said sections whereby foamable materials may be injected substantially simultaneously into each of said sections while maintained separated.
Claim 3
Dependent Claim
18 words
An assembly as set forth in claim 1 wherein said sheet is comprised of a relatively flexible material.
Claim 4
Dependent Claim
17 words
An assembly as set forth in claim 1 wherein said sheet is comprised of a rigid material.
Claim 5
Dependent Claim
30 words
An assembly as set forth in claim 1 wherein said sheet divides said cavity into a core section and shell section which at least in part surrounds said core section.
Claim 6
Dependent Claim
27 words
An assembly as set forth in claim 4 wherein said shell section is generally U-shaped in cross section and said core section is disposed within said U-shape.
Claim 7
Dependent Claim
47 words
An assembly as set forth in claim 5 wherein said cover member includes said passage means, said passage means including at least one passage extending therethrough and in communication with said core section and at least one passage extending therethrough and in communication with said shell section.
Claim 8
Dependent Claim
20 words
An assembly as set forth in claim 6 therein said cover member includes a protrusion extending into said core section.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |