GB1347821A - Multiple moulding of plastics optical lenses - Google Patents

Multiple moulding of plastics optical lenses

Info

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
Application number
GB2606472A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ashland Optical Corp
Original Assignee
Ashland Optical Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ashland Optical Corp filed Critical Ashland Optical Corp
Publication of GB1347821A publication Critical patent/GB1347821A/en
Expired legal-status Critical Current

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.
GB2606472A 1971-06-04 1972-06-05 Multiple moulding of plastics optical lenses Expired GB1347821A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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
IL39580A0 (en) 1972-07-26
AT343350B (en) 1978-05-26
ATA478672A (en) 1977-09-15
IE38112L (en) 1972-12-04
IL39580A (en) 1975-03-13
CH550653A (en) 1974-06-28
CA973671A (en) 1975-09-02
IE38112B1 (en) 1978-01-04

Similar Documents

Publication Publication Date Title
ES408636A1 (en) Injection molded seal and production thereof
CA978712A (en) Multicolor injection molding machine
CA957039A (en) Plastic injection molding machine monitor
IT8024900A0 (en) GAS VENT DEVICE INCORPORATED WITH A MOLD.
GB1347821A (en) Multiple moulding of plastics optical lenses
AU471538B2 (en) Moulding process
GB1401481A (en) Injection moulding machines
ZA733486B (en) Flameproof moulding compositions based on polyolefins
CA970512A (en) Injection moulding
US3836111A (en) Cylindrical mold for the production of a plurality of optical lenses
GB1395203A (en) Manufacture of optical lenses of organic material
SE7601449L (en) APPARATUS FOR SIMULTANEOUS INSERTION OF A NUMBER OF PREMISES IN A FORM
CA960921A (en) Process for providing cellulose fibre material with a flame-proof finish
GB1266866A (en)
ZA724262B (en) Plastic molding insert
CA965919A (en) Plastics moulding
AU461791B2 (en) An injection moulding machine with a venting device
CA1021434A (en) Injection molding machine controls
IT1079636B (en) THERMOPLASTIC POLYCARBONATE MOLDING MASSES WITH IMPROVED EXTRACTABILITY FROM THE MOLD
ZA721886B (en) Moulding process
NZ181899A (en) Antibiotic su743/a produced from culturing streptomyces mutabilis
CA638601A (en) Plastic molded box with novel lid
CA860834A (en) Injection molding machine
GB1428603A (en) Powder pressing moulds female elect
ES387486A3 (en) Improvements in injection molding machines. (Machine-translation by Google Translate, not legally binding)

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee