US4362685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing articles from thermo setting resin
Assignee: Safilo SpA
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Filing: 1979-06-07
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Granted: 1982-12-07
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Expires: 1999-06-07
Abstract
Abstract The method for producing articles from thermosetting resins, more particularly articles having a complex, variable shape such as spectacle frames, comprising in bottom casting liquid thermosetting resin into a mold and causing the resin to set in a field of centrifugal force.
Inventors
- 👤 Francesco Simioni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:47
CPC Classifications
B; B29; B29C; B29C39/00; B29C39/02; B29C39/04; B29C39/08; B29D; B29D12/00; B29D12/02; B29L; B29L2012/00; B29L2012/005
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
104 words
A method for molding a resin material in a mold having at least one article impression wherein said article impression is disposed in a centrifugal field about an axis of rotation comprising the steps of: (a) introducing said resin into said mold at about the axis of rotation thereof; (b) causing said resin to flow in a centrifugal field toward the periphery of said mold; and (c) supplying said resin to be molded to a radially outward portion of said article impression and filling said article impression in a centrifugal field from said outward portion in a direction substantially toward said axis of rotation.
Claim 2
Independent Claim
104 words
A method for molding a resin material in a mold having at least one article impression wherein said article impression is disposed in a centrifugal field about an axis of rotation comprising the steps of: (a) introducing said resin into said mold at about the axis of rotation thereof; (b) causing said resin to flow in a centrifugal field toward the periphery of said mold; and (c) supplying said resin to be molded to a radially outward portion of said article impression and filling said article impression in a centrifugal field from said outward portion in a direction substantially toward said axis of rotation.
Claim 3
Dependent Claim
51 words
A method according to claim 1, wherein said resin flows from about said axis of rotation in a direction substantially radially away from said axis of rotation toward the periphery of said mold and said resin then fills said article impression in a direction substantially radially toward said axis of rotation.
Claim 4
Dependent Claim
23 words
A method according to claim 2, wherein said resin flows away from said axis of rotation through a substantially radially extending supply duct.
Claim 5
Dependent Claim
31 words
A method according to claim 3, and further including the step of venting air from said article impression from a point located at the radial inward portion of said article impression.
Claim 6
Dependent Claim
31 words
A method according to claim 4, and further including the steps of splitting said resin in said radial supply duct into two streams, and supplying each stream to an article impression.
Claim 7
Dependent Claim
26 words
A method according to claim 2, wherein said resin is supplied to said radial supply duct from a casting well coaxial with said axis of rotation.
Claim 8
Dependent Claim
21 words
A method according to claim 6, wherein the radial length of said impression is many times longer than the transverse dimension.
Claim 9
Dependent Claim
16 words
A method according to claim 6, wherein the cross-section of said impression varies along the impression.
Claim 10
Dependent Claim
13 words
A method according to claim 1, wherein said resin is a thermosetting resin.
Claim 11
Dependent Claim
23 words
A method according to claim 9, and further including the step of causing the resin to set in a field of centrifugal force.
Claim 12
Dependent Claim
29 words
A method according to claim 9, and further including the steps of gelling the resin in a field of centrifugal force and heating the resin until it completely sets.
Claim 13
Dependent Claim
34 words
A method according to claim 9, and further including the steps of causing the resin to gel in the same said field of centrifugal force and heating the resin to complete the gelling process.
Claim 14
Dependent Claim
21 words
A method according to claim 9, wherein said resin is selected from the group consisting of epoxide, polyurethane and polyester resins.
Claim 15
Independent Claim
12 words
A method for producing spectacle frames according to claims 7 or 8.
Claim 16
Dependent Claim
28 words
A method according to claim 4, wherein said mold comprises a top half and a bottom half, said article impressions and said radial supply ducts being formed therebetween.
Claim 17
Dependent Claim
24 words
A method according to claim 15, wherein said mold includes a plurality of radial supply ducts and a plurality of radially extending article impressions.
Claim 18
Independent Claim
101 words
A method for molding a resin material in a mold having at least one article impression wherein said article impression is disposed in a centrifugal field about an axis of rotation comprising the steps of: (a) introducing said resin into a casting well in said mold; (b) causing said resin to flow in a centrifugal field toward the periphery of said mold; and (c) supplying said resin to be molded to a radially outward portion of said impression and filling said article impression in a centrifugal field from said radial outward portion in a direction substantially toward said axis of rotation.
Claim 19
Independent Claim
101 words
A method for molding a resin material in a mold having at least one article impression wherein said article impression is disposed in a centrifugal field about an axis of rotation comprising the steps of: (a) introducing said resin into a casting well in said mold; (b) causing said resin to flow in a centrifugal field toward the periphery of said mold; and (c) supplying said resin to be molded to a radially outward portion of said impression and filling said article impression in a centrifugal field from said radial outward portion in a direction substantially toward said axis of rotation.
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) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |