IE38112B1 - Multiple molding of plastics optical lenses - Google Patents

Multiple molding of plastics optical lenses

Info

Publication number
IE38112B1
IE38112B1 IE757/72A IE75772A IE38112B1 IE 38112 B1 IE38112 B1 IE 38112B1 IE 757/72 A IE757/72 A IE 757/72A IE 75772 A IE75772 A IE 75772A IE 38112 B1 IE38112 B1 IE 38112B1
Authority
IE
Ireland
Prior art keywords
holder
optical
moulding material
lenses
june
Prior art date
Application number
IE757/72A
Other versions
IE38112L (en
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 IE38112L publication Critical patent/IE38112L/en
Publication of IE38112B1 publication Critical patent/IE38112B1/en

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. [GB1347821A]
IE757/72A 1971-06-04 1972-06-02 Multiple molding of plastics optical lenses IE38112B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15004071A 1971-06-04 1971-06-04

Publications (2)

Publication Number Publication Date
IE38112L IE38112L (en) 1972-12-04
IE38112B1 true IE38112B1 (en) 1978-01-04

Family

ID=22532855

Family Applications (1)

Application Number Title Priority Date Filing Date
IE757/72A IE38112B1 (en) 1971-06-04 1972-06-02 Multiple molding 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)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219241A (en) * 1988-03-02 1989-12-06 Pilkington Visioncare Holdings Method and apparatus for moulding and casting using gated dies, and for moulding constant thickness lenses

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
GB1347821A (en) 1974-02-27
AT343350B (en) 1978-05-26

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