GB1347821A - Multiple moulding of plastics optical lenses - Google Patents
Multiple moulding of plastics optical lensesInfo
- Publication number
- GB1347821A GB1347821A GB2606472A GB2606472A GB1347821A GB 1347821 A GB1347821 A GB 1347821A GB 2606472 A GB2606472 A GB 2606472A GB 2606472 A GB2606472 A GB 2606472A GB 1347821 A GB1347821 A GB 1347821A
- Authority
- GB
- United Kingdom
- Prior art keywords
- holder
- optical
- moulding material
- lenses
- june
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/301—Modular mould systems [MMS], i.e. moulds built up by stacking mould elements, e.g. plates, blocks, rods
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/76—Office equipment or accessories
- B29L2031/7602—Maps
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
1347821 Multiple moulding of lenses ASHLAND OPTICAL CORP 5 June 1972 [4 June 1971] 26064/72 Heading B5A A plurality of optical plastics lenses are cast simultaneously in apparatus comprising at least four optical mould elements, a resilient holder having groove formations to engage the periphery of, and thereby position, the mould elements spaced from one another to define mould cavities therebetween, a rigid holder engaging the exterior of the resilient holder to prevent distortion thereof, and an aperture extending through the holders to supply moulding material. As shown in Fig. 1, mould elements 11 are placed in grooves 12 in resilient holder 13 having a slit 15 therein, holder 13 being held in rigid holder 14 having a lower half 16, upper half or cover 17 pivoted thereto at 22 and ends 18, 19. Gaskets 16a, 16b, 18a, 19a are provided. Cover 17 has holes 17a, 17b, one of which serves to supply moulding material, the other acting as a vent during filling. After assembly, parts 16, 17 are closed, latched at 33, 36 and tightened by knobs (37). Moulding material is supplied through aperture 17a or 17b and slit 15 and the assembly placed in an oven to set the thermosetting plastics material.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15004071A | 1971-06-04 | 1971-06-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1347821A true GB1347821A (en) | 1974-02-27 |
Family
ID=22532855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2606472A Expired GB1347821A (en) | 1971-06-04 | 1972-06-05 | Multiple moulding of plastics optical lenses |
Country Status (6)
Country | Link |
---|---|
AT (1) | AT343350B (en) |
CA (1) | CA973671A (en) |
CH (1) | CH550653A (en) |
GB (1) | GB1347821A (en) |
IE (1) | IE38112B1 (en) |
IL (1) | IL39580A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2628031A1 (en) * | 1988-03-02 | 1989-09-08 | Pilkington Visioncare Holdings | METHODS AND APPARATUS FOR MANUFACTURING CASTING OR MOLDED OBJECTS, IN PARTICULAR CORRECTIVE LENSES |
-
1972
- 1972-05-31 IL IL39580A patent/IL39580A/en unknown
- 1972-05-31 CH CH804472A patent/CH550653A/en not_active IP Right Cessation
- 1972-06-02 IE IE757/72A patent/IE38112B1/en unknown
- 1972-06-02 CA CA143,757A patent/CA973671A/en not_active Expired
- 1972-06-02 AT AT478672A patent/AT343350B/en not_active IP Right Cessation
- 1972-06-05 GB GB2606472A patent/GB1347821A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2628031A1 (en) * | 1988-03-02 | 1989-09-08 | Pilkington Visioncare Holdings | METHODS AND APPARATUS FOR MANUFACTURING CASTING OR MOLDED OBJECTS, IN PARTICULAR CORRECTIVE LENSES |
GB2219243A (en) * | 1988-03-02 | 1989-12-06 | Pilkington Visioncare Holdings | Moulding different lenses having the same edge thickness |
Also Published As
Publication number | Publication date |
---|---|
CA973671A (en) | 1975-09-02 |
IE38112L (en) | 1972-12-04 |
IL39580A (en) | 1975-03-13 |
IL39580A0 (en) | 1972-07-26 |
ATA478672A (en) | 1977-09-15 |
CH550653A (en) | 1974-06-28 |
IE38112B1 (en) | 1978-01-04 |
AT343350B (en) | 1978-05-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |