DE2542714A1 - Marking silicone rubber contact lenses - by etching or engraving the mould used and so embossing the lenses during their mfr. - Google Patents

Marking silicone rubber contact lenses - by etching or engraving the mould used and so embossing the lenses during their mfr.

Info

Publication number
DE2542714A1
DE2542714A1 DE19752542714 DE2542714A DE2542714A1 DE 2542714 A1 DE2542714 A1 DE 2542714A1 DE 19752542714 DE19752542714 DE 19752542714 DE 2542714 A DE2542714 A DE 2542714A DE 2542714 A1 DE2542714 A1 DE 2542714A1
Authority
DE
Germany
Prior art keywords
markings
silicone rubber
contact lenses
lenses
marking
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.)
Granted
Application number
DE19752542714
Other languages
German (de)
Other versions
DE2542714C2 (en
Inventor
Paul Dipl Phys Feneberg
Willi Kaue
Ulrich Ing Grad Krekeler
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.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
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 Agfa Gevaert AG filed Critical Agfa Gevaert AG
Priority to DE19752542714 priority Critical patent/DE2542714C2/en
Publication of DE2542714A1 publication Critical patent/DE2542714A1/en
Application granted granted Critical
Publication of DE2542714C2 publication Critical patent/DE2542714C2/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
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00317—Production of lenses with markings or patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices
    • B24B13/0055—Positioning of lenses; Marking of lenses
    • 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
    • B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
    • B29C33/424—Moulding surfaces provided with means for marking or patterning
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00317—Production of lenses with markings or patterns
    • B29D11/00326—Production of lenses with markings or patterns having particular surface properties, e.g. a micropattern
    • B29D11/00336—Production of lenses with markings or patterns having particular surface properties, e.g. a micropattern by making depressions in the lens surfaces
    • 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
    • G02C7/021—Lenses; Lens systems ; Methods of designing lenses with pattern for identification or with cosmetic or therapeutic effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Theoretical Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

The markings are made on the press-mould in a shape distinct from the surface characteristics of the surrounding lens area, so that, when the contact lens is mfd. the marking appears as an embossment. The marking which so becomes an integral part of the resulting contact lens, may be used as a code symbol or some such distinctive feature.

Description

Verfahren und Vorrichtung zum Aufbringen von Markierungen Method and device for applying markings

auf Kontaktlinsen aus Silikonkautschuk Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Aufbringen von Markierungen auf Kontaktlinsen aus Silikonkautschuk, welche mittels Presstempeln hergestellt werden Es. ist bekannt, bei der Herstellung von Kontaktlinsen aus PMMA (Polynethyl-metacrylat) die einzelnen Linsen mit Markierungen zu versehen, die die optischen Daten, vorzugsweise Innenradius und Brechkraft' charakterisieren. Dies ist erforderlich,um iirndie zahlreichen verschiedenen Linsen eines Anpassatzes schnell und zuverlässig sortieren zu können. Diese Markierungen werden in die Linsen eingraviert. on contact lenses made of silicone rubber The invention relates to a Method and apparatus for applying markings to contact lenses made of silicone rubber, which are produced by means of press dies Es. is known, in the manufacture of contact lenses made of PMMA (Polynethyl-Methacrylat) the individual Lenses with markings to provide the optical data, preferably Characterize inner radius and refractive power '. This is necessary for the numerous to be able to sort different lenses of a fitting set quickly and reliably. These marks are engraved on the lenses.

Bei herkömmlichen weichen Kontaktlinsen aus HEMA (Metacrylsäure-2-hydroxy-äthyl-ester), die während des Herstellvorganges hart sind, ist es während der harten Phase ebenfalls möglich, solche Markierungen in die Linsen einzugravieren.With conventional soft contact lenses made of HEMA (methacrylic acid-2-hydroxy-ethyl-ester), which are hard during the manufacturing process, so is during the hard phase possible to engrave such marks in the lenses.

Anders verhält es sich mit Linsen aus Silikonkautschuk, die mittels entsprechend geformter Presswerkzeuge hergestellt werden und nach dem Pressen bereits weich aus dem Werkzeug kommen. Ein Eingravieren von Markierungen in weiche Linsen ist nicht möglich.The situation is different with lenses made of silicone rubber, which by means of correspondingly shaped pressing tools are produced and already after pressing come out of the tool softly. An engraving of markings in soft lenses can not.

Es ist das Ziel der Erfindung, ein Verfahren zum Aufbringen von Markierungen auch auf Kontaktlinsen aus Silikonkautschuk und zu dessen Durchführung geeignete Vorrichtungen zu schaffen.It is the aim of the invention to provide a method for applying markings also on contact lenses made of silicone rubber and suitable for its implementation To create devices.

Erfindungsgemäss wird dies dadurch erreicht, dass zum Aufbringen von Markiefungen auf die Kontaktlinsen aus Silikonkautschuk dieselben mit Presstempeln erzeugt werden, die ihrerseits die Markierungen in abprägbarer Form enthalten. Zweckmässig weisen die Presstempel im Randbreich ausserhalb der optisch wirksamen Zone alphanumerische Markierungen auf. Diese können in die Presstempel eingraviert oder eingeätzt sein, so dass sie auf der Kontaktlinse erhaben erscheinen.According to the invention, this is achieved in that for the application of Marked indentations on the contact lenses made of silicone rubber, the same with press stamps are generated, which in turn contain the markings in a stampable form. Appropriate the stamps indicate alphanumeric in the edge area outside the optically effective zone Markings on. These can be included in the Engraved or stamped etched so that they appear raised on the contact lens.

Besonders vorteilhaft ist es, die Markierungen aus aufgerauhten Bereichen in der im übrigen glatten Stempeloberfläche zu bilden.It is particularly advantageous to make the markings from roughened areas to form in the otherwise smooth stamp surface.

Solche rauhen Marken tragen nicht auf und sind trotzdem auf den Linsen gut erkennbar.Such rough marks do not apply and are still on the lenses good to see.

Einzelheiten der Erfindung ergeben sich aus der Beschreibung und der Zeichnung.Details of the invention emerge from the description and the Drawing.

Es zeigen Fig. 1 schematisch ein Presstempelpaar mit einer Kontaktlinse aus Silikonkautschuk, Fig. 2 eine Aufsicht auf eine mit Markierungen versehene Kontaktlinse.1 shows schematically a pair of press dies with a contact lens made of silicone rubber, FIG. 2 is a plan view of a contact lens provided with markings.

In Figur 1 ist mit 1 eine Kontaktlinse bezeichnet, die die Form eines negativen Meniskus aufweist. Die äussere gekrümmte Flache la und die innere Fläche lc begrenzen den optisch wirksamen Linsen körper und haben demnach Oberflächen in der entsprechenden präzisen Beschaffenheit aufzuweisen, Die Linse 1 wird mittels zweier Presstempel 2 und 3 in beknnnter Weise gepresst. Da sie das Werkzeug in weichem Zustand verlässt, ist ein Gravieren der Linse, wie es herkömmlich ist, nicht möglich.In Figure 1, 1 designates a contact lens which has the shape of a has negative meniscus. The outer curved surface la and the inner surface lc limit the optically effective lens body and therefore have surfaces in to have the corresponding precise nature, the lens 1 is by means of two press dies 2 and 3 pressed in a known manner. Since they are the tool in soft If it leaves the state, engraving of the lens, as is conventional, is not possible.

Aus diesem Grunde werden gemäss der Erfindung die Presstempel 1 und/oder 2 an ihren wirksamen Flächen 2a bzw. 3a mit Markierungen versehen, die sich auf der fertigen Linse abzeichnen. Die Erfahrung hat gezeigt, dass geringe Unregelmässigkeiten in der Oberfläche am Rand der Linse keine negativen Auswirkungen haben, sofern sie keine Möglichkeit zur Anlagerung von Schmutz bzw.For this reason, according to the invention, the press rams 1 and / or 2 on their effective surfaces 2a and 3a with markings Mistake, which can be seen on the finished lens. Experience has shown that low Irregularities in the surface at the edge of the lens have no negative effects if they have no possibility of accumulation of dirt or

Fett bieten.Offer fat.

Es werden also in den Randbereichen 2b bzw. 3b der Stempel alphanumerische Zeichen eingeätzt oder -graviert, welche auf der Linse als Marken Ib erhaben erscheinen. Da naturgemäss die Höhe der Zeichen nur gering sein darf - die Darstellung in den Figuren ist stark überhöht damit kein Fremdkörpergefühl auftritt, ist ein Kompromiss zwischen der Sichtbarkeit der Zcichen und der Verträglichkeit der Linse notwendig.The stamps are therefore alphanumeric in the edge areas 2b and 3b Characters etched or engraved, which appear raised on the lens as marks Ib. Since, of course, the height of the characters may only be small - the representation in the Figures is highly exaggerated so that there is no feeling of a foreign body, is a compromise between the visibility of the characters and the compatibility of the lens.

Eine vorteilhaftere Methode besteht darin, die Stempel, deren wirksame Oberfläche hochglänzend ist, mit matten bzw. rauhen Zeichen zu versehen. Dies kann bei Glasstempeln durch Anätzen mit Flussäuredämpfen bzw. bei Metall- oder Kunststoffstempeln durch Anätzen mit entsprechenden Lösungsmitteln geschehen.A more advantageous method is to use the stamps, their effective The high-gloss surface is to be provided with matt or rough characters. This can in the case of glass stamps by etching with hydrofluoric acid vapors or in the case of metal or plastic stamps done by etching with appropriate solvents.

Die verhältnismässig schmalen matten Zeichen stören optisch nicht und mechanisch nicht merklich, wobei natürlich vorausgesetzt werden muss, dass auf sorgfältige Hydrophilierung der Oberflächen geachtet wird.The relatively narrow, matte characters do not interfere visually and mechanically not noticeable, although it must of course be assumed that on careful hydrophilization of the surfaces is observed.

Die Zeichen können auf beiden Seiten der Linse sein; wegen der besseren Verträglichkeit wird jedoch die Hohlseite bevorzugt.The characters can be on either side of the lens; because of the better ones However, the hollow side is preferred for compatibility.

Ebenso kann für die Kodierung ein beliebiger Schlüssel gewählt werden, der vorzugsweise aus alphanumerischen Zeichen, also Zahlen oder Buchstaben besteht, die in einem logischen Zusammenhang mit den optischen Daten der Linse, also insbesondere Innenradius und Brechkraft stehen.Any key can also be selected for the coding, which preferably consists of alphanumeric characters, i.e. numbers or letters, in a logical connection with the optical data of the lens, so in particular Inside radius and refractive power are.

LeerseiteBlank page

Claims (5)

Ansprüche 0 Verfahren zum Aufbringen von Markierungen auf Kontaktlinsen aus Silikonkautschuk, welche mittels Presstempeln hergestellt werden, dadurch gekennzeichnet, dass die Markierungen (2b, 3b) auf den Presstempeln (#, 3) in bezüglich der Oberflächenbeschaffenheit der Umgebung unterschiedlicher Form aufgebracht und beim Herstellen der Kontaktlinsen (1) auf dieselben aufgeprägt werden.Claims 0 method for applying markings to contact lenses made of silicone rubber, which are produced by means of press dies, characterized in that, that the markings (2b, 3b) on the press dies (#, 3) in terms of the surface properties applied to the environment of different shapes and during the manufacture of the contact lenses (1) to be impressed on the same. 2. Presstempel zur Herstellung von Kontaktlinsen aus Silikonkautschuk, dadurch gekennzeichnet, dass er im Randbereich ausserhalb der optisch hauptsächlich wirksamen Zone abprägbare Markierungen (2b, 3b) aufweist.2. Press dies for the production of contact lenses from silicone rubber, characterized in that it is mainly optically in the edge area outside the effective zone has stampable markings (2b, 3b). 3. Presstempel nach Anspruch 2, dadurch gekennzeichnet, dass die Markierungen (2b, 3b) in die Stempeloberfläche (2a, 3a) eingraviert sind.3. Press die according to claim 2, characterized in that the markings (2b, 3b) are engraved into the stamp surface (2a, 3a). 4. Presstempel nach Anspruch 2, dadurch gekennzeichnet, dass im Randbereich ausserhalb der optisch hauptsächlich wirksamen Zone abprägbare Markierungen (2b, 3b) eingeätzt sind.4. Press die according to claim 2, characterized in that in the edge area markings that can be embossed outside the optically mainly effective zone (2b, 3b) are etched. 5. Presstempel nach Anspruch 2, dadurch gekennzeichnet, dass die Markierungen (2b, 3b) aus aufgerauhten Bereichen in der im übrigen glatten Stempeloberfläche #(2a, 3a) bestehen.5. Press die according to claim 2, characterized in that the markings (2b, 3b) from roughened areas in the otherwise smooth stamp surface # (2a, 3a) pass.
DE19752542714 1975-09-25 1975-09-25 Method and press die for applying markings to contact lenses made of silicone rubber Expired DE2542714C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752542714 DE2542714C2 (en) 1975-09-25 1975-09-25 Method and press die for applying markings to contact lenses made of silicone rubber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752542714 DE2542714C2 (en) 1975-09-25 1975-09-25 Method and press die for applying markings to contact lenses made of silicone rubber

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DE2542714A1 true DE2542714A1 (en) 1977-04-07
DE2542714C2 DE2542714C2 (en) 1984-01-19

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2925783A1 (en) * 1978-06-21 1980-01-10 Spofa Vereinigte Pharma Werke PLANARIZED HYDROPHILE CONTACT LENSES IN THE XEROGEL STATE, THEIR PRODUCTION AND DEVICE FOR THEIR STORAGE AND FINISHING
DE4102059A1 (en) * 1990-01-24 1991-08-08 Hoya Corp MOLD FOR USE IN LENS PRODUCTION
FR2675912A1 (en) * 1991-04-25 1992-10-30 Seiko Epson Corp Plastic lenses for correcting spectacles
EP0765732A2 (en) * 1995-09-29 1997-04-02 JOHNSON & JOHNSON VISION PRODUCTS, INC. Marking of mold inserts to produce marked contact lenses
US6024448A (en) * 1998-03-31 2000-02-15 Johnson & Johnson Vision Products, Inc. Contact lenses bearing identifying marks
EP1014152A1 (en) * 1998-12-14 2000-06-28 JOHNSON & JOHNSON VISION PRODUCTS, INC. Markings for contact lenses
USRE37071E1 (en) 1997-12-22 2001-02-27 Canadian Contact Lens Laboratories Ltd. Marked contact lens bearing optical marking element
US6203156B1 (en) 1998-03-31 2001-03-20 Johnson & Johnson Vision Care, Inc. Contact lenses bearing marks
WO2002087859A1 (en) * 2001-05-02 2002-11-07 Concepcionlicence Ag Engraving for characterizing optical lenses
DE102007021953A1 (en) * 2007-05-10 2008-11-13 Carl Zeiss Smt Ag Optical component for use in interferometric measuring device, has diffractive auxiliary unit converting irradiated light into auxiliary waves, where fictitious surface is positioned in auto-collimation position concerning spherical waves

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457761A (en) * 1983-02-16 1984-07-03 Precision Cosmet Co., Inc. Method and apparatus for marking contact lenses
US4616910A (en) * 1983-03-01 1986-10-14 Klein Robert E Visual indicator on soft contact lenses
CS260213B1 (en) * 1986-03-05 1988-12-15 Jiri Sulc Method of polymerization casting of articles especially lenses from hydrophilic gels and equipment for realization of this method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2152062A1 (en) * 1970-10-19 1972-04-27 Lunetterie Et D Optique Ration Method, mold and press web for the production of contact lenses, in particular flexible contact lenses

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2152062A1 (en) * 1970-10-19 1972-04-27 Lunetterie Et D Optique Ration Method, mold and press web for the production of contact lenses, in particular flexible contact lenses

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2925783A1 (en) * 1978-06-21 1980-01-10 Spofa Vereinigte Pharma Werke PLANARIZED HYDROPHILE CONTACT LENSES IN THE XEROGEL STATE, THEIR PRODUCTION AND DEVICE FOR THEIR STORAGE AND FINISHING
DE4102059A1 (en) * 1990-01-24 1991-08-08 Hoya Corp MOLD FOR USE IN LENS PRODUCTION
FR2675912A1 (en) * 1991-04-25 1992-10-30 Seiko Epson Corp Plastic lenses for correcting spectacles
EP0765732A2 (en) * 1995-09-29 1997-04-02 JOHNSON & JOHNSON VISION PRODUCTS, INC. Marking of mold inserts to produce marked contact lenses
EP0765732A3 (en) * 1995-09-29 1997-10-15 Johnson & Johnson Vision Prod Marking of mold inserts to produce marked contact lenses
USRE37071E1 (en) 1997-12-22 2001-02-27 Canadian Contact Lens Laboratories Ltd. Marked contact lens bearing optical marking element
US6024448A (en) * 1998-03-31 2000-02-15 Johnson & Johnson Vision Products, Inc. Contact lenses bearing identifying marks
US6203156B1 (en) 1998-03-31 2001-03-20 Johnson & Johnson Vision Care, Inc. Contact lenses bearing marks
EP1014152A1 (en) * 1998-12-14 2000-06-28 JOHNSON & JOHNSON VISION PRODUCTS, INC. Markings for contact lenses
WO2002087859A1 (en) * 2001-05-02 2002-11-07 Concepcionlicence Ag Engraving for characterizing optical lenses
DE102007021953A1 (en) * 2007-05-10 2008-11-13 Carl Zeiss Smt Ag Optical component for use in interferometric measuring device, has diffractive auxiliary unit converting irradiated light into auxiliary waves, where fictitious surface is positioned in auto-collimation position concerning spherical waves
DE102007021953B4 (en) * 2007-05-10 2009-01-29 Carl Zeiss Smt Ag Interferometric measuring device for measuring a surface of a test object

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