US3836111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylindrical mold for the production of a plurality of optical lenses
Assignee: Ashland Optical Corp
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Filing: 1972-11-24
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Granted: 1974-09-17
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Expires: 1992-11-24
Abstract
Abstract A plurality of plastic eyeglass lenses are molded simultaneously using apparatus comprising a plurality of optical mold elements held in generally parallel spaced relationship in annular interior grooves of a horizontally extending elongated cylindrical resilient holder disposed within the cylindrical cavity of a rigid holder. The latter is provided with an openable cover mounted to horizontal hinges and defining the upper half of the cylindrical cavity. With the cover open the resilient holder may be entered into and withdrawn from the cylindrical cavity and the resilient holder may be deformed for mounting the mold elements.
Inventors
- 👤 J Binder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:57
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/30; B29C33/301; B29L; B29L2031/00; B29L2031/76; B29L2031/7602; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
126 words
Apparatus for simultaneously casting a plurality of optical plastic lenses; said apparatus including a plurality of optical mold elements, at least four in number; a resilient holder bearing positioning means in operative engagement with the periphery of each of said mold elements to position said mold elements in generally parallel relationship and spaced from one another to form mold cavities between adjacent ones of said mold elements; a rigid holder engaging the exterior of said resilient holder to prevent distortion of the latter or shifting of said mold elements; and aperture means extending through said holders and through which molding material is loaded into said mold cavities; said resilient holder being cylindrical and said rigid holder defining a cylindrical cavity wherein said resilient holder is disposed.
Claim 2
Dependent Claim
126 words
Apparatus for simultaneously casting a plurality of optical plastic lenses; said apparatus including a plurality of optical mold elements, at least four in number; a resilient holder bearing positioning means in operative engagement with the periphery of each of said mold elements to position said mold elements in generally parallel relationship and spaced from one another to form mold cavities between adjacent ones of said mold elements; a rigid holder engaging the exterior of said resilient holder to prevent distortion of the latter or shifting of said mold elements; and aperture means extending through said holders and through which molding material is loaded into said mold cavities; said resilient holder being cylindrical and said rigid holder defining a cylindrical cavity wherein said resilient holder is disposed.
Claim 3
Dependent Claim
48 words
Apparatus as set forth in claim 1 in which the positioning means includes a plurality of interior grooves in said resilient holder; said grooves being in spaced generally parallel planes with the periphery of each of said mold elements being disposed within an individual one of said grooves.
Claim 4
Dependent Claim
20 words
Apparatus as set forth in claim 1, further characterized in that there are rigid end walls defining the cylindrical cavity.
Claim 5
Dependent Claim
48 words
Apparatus as set forth in claim 1, further characterized in that it also includes means for positioning the rigid holder with the longitudinal axis of the cylindrical cavity substantially horizontal; said rigid holder having an operable cover through which said resilient holder is inserted into said cylindrical cavity.
Claim 6
Dependent Claim
70 words
Apparatus as set forth in claim 4, further characterized in that the cover extends for substantially the full length of said rigid holder and defines the upper half of said cylindrical cavity; with said cover open and said resilient holder seated in the lower half of said resilient cavity upper portions of said resilient holder being outwardly deflectable in opposite directions to permit insertion and/or removal of said mold elements.
Claim 7
Dependent Claim
35 words
Apparatus as set forth in claim 4, further characterized in that the aperture means includes a longitudinal slot in said resilient holder positioned at the top thereof and extending for substantially the full length thereof.
Claim 8
Dependent Claim
39 words
Apparatus as set forth in claim 6, further characterized in that the plurality of optical mold elements are positioned so that the optical axes of the cast optical plastic lenses extend along the longitudinal axis of the resilient holder.
Claim 9
Dependent Claim
34 words
Apparatus as set forth in claim 7, further characterized in that the cover extends for substantially the full length of said rigid holder and essentially defines the entire upper half of the cylindrical cavity.
Claim 10
Dependent Claim
32 words
Apparatus as set forth in claim 8, further characterized in that the cover is pivotally mounted on a horizontal axis; and releasable locking means for retaining said cover in its closed position.
Claim 11
Dependent Claim
50 words
Apparatus as set forth in claim 9, further characterized in that said aperture means includes a first hole in said cover; a second hole in said cover constituting a vent means; with said cover closed said holes positioned near opposite ends of the cylindrical cavity and at the top thereof.
Claim 12
Dependent Claim
31 words
Apparatus as set forth in claim 1 in which the holders are longitudinally slit to form openable sections whereby molded products are removable from said apparatus and the latter is reusable.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |