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公开(公告)号：US20230182423A1
公开(公告)日：2023-06-15
申请号：US18165653
申请日：2023-02-07
Applicant: Alcon Inc.
Inventor： Richard Charles Breitkopf , Changhong Yin , Steve Yun Zhang
CPC classification number: B29D11/00903 , C08L83/04 , G02B1/043
Abstract: The invention relates to a pad printing instrument comprising an ink supply system capable of control the temperature, viscosity and colorant concentration of an ink in an ink cup. Such controls are achieved by continuously adding and mixing a cold ink having a composition identical to the ink in the ink cup but having a lower temperature. The continuous addition of a small amount of a cold ink into the ink cup could compensate heat generated by the friction between the ink cup and a cliché and could minimize the evaporation of a diluent in the ink and change in the concentration of colorants in the ink and ink viscosity. The invention also relates to use of a pad printing instrument comprising an ink supply system of the invention for producing colored hydrogel or silicone hydrogel contact lenses.
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Patent Agency Ranking
公开(公告)号：US20200376787A1
公开(公告)日：2020-12-03
申请号：US16884512
申请日：2020-05-27
Applicant: Alcon Inc.
Inventor： Steve Yun Zhang , Changhong Yin , Richard Charles Breitkopf
Abstract: The invention provides a thermal cast-molding method for producing colored silicone hydrogel contact lenses. The method of the invention comprises: (1) forming, on a molding surface of a mold, a transferable colored polymeric composite film which comprises or consists essentially of a first polymeric film, a second polymeric film and a cured colored image encapsulated therewithin; (2) dispensing a silicone hydrogel lens formulation into the lens-forming cavity of the mold; and (4) thermally curing the third polymerizable composition within the lens-forming cavity for at least about 40 minutes to form the colored silicone hydrogel contact lens, whereby the transferable, colored, and polymeric composite film detaches from the first or second molding surface and becomes integral with the body of the silicone hydrogel contact lens.
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公开(公告)号：US11602910B2
公开(公告)日：2023-03-14
申请号：US16884536
申请日：2020-05-27
Applicant: Alcon Inc.
Inventor： Richard Charles Breitkopf , Changhong Yin , Steve Yun Zhang
Abstract: The invention relates to a pad printing instrument comprising an ink supply system capable of control the temperature, viscosity and colorant concentration of an ink in an ink cup. Such controls are achieved by continuously adding and mixing a cold ink having a composition identical to the ink in the ink cup but having a lower temperature. The continuous addition of a small amount of a cold ink into the ink cup could compensate heat generated by the friction between the ink cup and a cliché and could minimize the evaporation of a diluent in the ink and change in the concentration of colorants in the ink and ink viscosity. The invention also relates to use of a pad printing instrument comprising an ink supply system of the invention for producing colored hydrogel or silicone hydrogel contact lenses.
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公开(公告)号：US11584097B2
公开(公告)日：2023-02-21
申请号：US16884512
申请日：2020-05-27
Applicant: Alcon Inc.
Inventor： Steve Yun Zhang , Changhong Yin , Richard Charles Breitkopf
Abstract: The invention provides a thermal cast-molding method for producing colored silicone hydrogel contact lenses. The method of the invention comprises: (1) forming, on a molding surface of a mold, a transferable colored polymeric composite film which comprises or consists essentially of a first polymeric film, a second polymeric film and a cured colored image encapsulated therewithin; (2) dispensing a silicone hydrogel lens formulation into the lens-forming cavity of the mold; and (4) thermally curing the third polymerizable composition within the lens-forming cavity for at least about 40 minutes to form the colored silicone hydrogel contact lens, whereby the transferable, colored, and polymeric composite film detaches from the first or second molding surface and becomes integral with the body of the silicone hydrogel contact lens.
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公开(公告)号：US11840035B2
公开(公告)日：2023-12-12
申请号：US18165653
申请日：2023-02-07
Applicant: Alcon Inc.
Inventor： Richard Charles Breitkopf , Changhong Yin , Steve Yun Zhang
CPC classification number: B29D11/00903 , C08L83/04 , G02B1/043
Abstract: The invention relates to a pad printing instrument comprising an ink supply system capable of control the temperature, viscosity and colorant concentration of an ink in an ink cup. Such controls are achieved by continuously adding and mixing a cold ink having a composition identical to the ink in the ink cup but having a lower temperature. The continuous addition of a small amount of a cold ink into the ink cup could compensate heat generated by the friction between the ink cup and a cliché and could minimize the evaporation of a diluent in the ink and change in the concentration of colorants in the ink and ink viscosity. The invention also relates to use of a pad printing instrument comprising an ink supply system of the invention for producing colored hydrogel or silicone hydrogel contact lenses.
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公开(公告)号：US20200376788A1
公开(公告)日：2020-12-03
申请号：US16884536
申请日：2020-05-27
Applicant: Alcon Inc.
Inventor： Richard Charles Breitkopf , Changhong Yin , Steve Yun Zhang
Abstract: The invention relates to a pad printing instrument comprising an ink supply system capable of control the temperature, viscosity and colorant concentration of an ink in an ink cup. Such controls are achieved by continuously adding and mixing a cold ink having a composition identical to the ink in the ink cup but having a lower temperature. The continuous addition of a small amount of a cold ink into the ink cup could compensate heat generated by the friction between the ink cup and a cliché and could minimize the evaporation of a diluent in the ink and change in the concentration of colorants in the ink and ink viscosity. The invention also relates to use of a pad printing instrument comprising an ink supply system of the invention for producing colored hydrogel or silicone hydrogel contact lenses.
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