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公开(公告)号：US20200183192A1
公开(公告)日：2020-06-11
申请号：US16708685
申请日：2019-12-10
Applicant: Alcon Inc.
Inventor： Yeming Gu , Curtis Dean McKenney , Cornelius Daniel Niculas
Abstract: A method of manufacturing of an astigmatic contact lens having a toric portion and a thickness differential feature to provide lens orientation on eye portion such that said thickness differential causes the toric portion of the contact lens to properly orient in the eye of the wearer. The toric lenses are manufactured by an effective process control method for cylinder power in toric lens production by determining an amount of a mold cylinder compensation which is caused by processes in a toric lens manufacturing system including tool making, injection molding, casting and curing, wherein the mold cylinder is defined as the difference in measured radius of curvature at two orthogonal directions. A control metric is established by using the amount of a mold cylinder compensation and tolerance range and reject mold out of the control limits and improve the production yield for toric lens manufacturing.
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公开(公告)号：US20230166467A1
公开(公告)日：2023-06-01
申请号：US18070189
申请日：2022-11-28
Applicant: Alcon Inc.
Inventor： Yang Zheng , Cornelius Daniel Niculas , Yuan Chang , Junhao Ge , Steve Yun Zhang , Justin Joel Aguayo , David Andrew Icenogle , Muhammad Waqas Asif , Daryl Reece
CPC classification number: B29D11/00519 , B29D11/00038 , G02B1/043 , G02C7/04 , B29K2083/00
Abstract: Systems, devices, and methods are disclosed for fabricating a hybrid contact lens product having a lens insert embedded at a precisely controlled location within a lens body. A mold engagement and support base engages and retains a lens forming mold in a substantially fixed position. An insert placement and positioning device includes an insert pickup head with a contact face configured for releasable engagement of the lens insert and at least one suction opening in the contact face for applying suction to engage the insert on the contact face. A positioning housing interacts with the mold and/or the support base to provide precise locational positioning of the lens insert within the mold. A lens body forming material is delivered to the mold to encapsulate the lens insert.
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公开(公告)号：US20230357478A1
公开(公告)日：2023-11-09
申请号：US18313489
申请日：2023-05-08
Applicant: Alcon Inc.
Inventor： Newton T. Samuel , Cornelius Daniel Niculas , Richard Charles Breitkopf , Nicholas Gober , Chandana Kolluru , Zahra Bassampour , Steve Yun Zhang
IPC: C08F283/12
CPC classification number: C08F283/124
Abstract: A method for producing embedded hydrogel contact lenses comprises at least the following steps: depositing a small drop of a viscous lens-forming composition in the center of a female lens mold half; placing a preformed insert on top of the small drop precisely in the center of the female lens mold half so that the insert is held by capillary forces due to the presence of a thin layer of the viscous lens-forming composition between the insert and the molding surface of the female lens mold half; dosing an amount of another less viscous lens-forming composition on top of the insert to immerse the insert in the female lens mold half; closing tightly a male lens mold half onto the top of the female lens mold half halves to form a molding assembly; curing both the lens-forming compositions in the molding assembly to form an embedded hydrogel lens precursor.
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Patent Agency Ranking
公开(公告)号：US20220326412A1
公开(公告)日：2022-10-13
申请号：US17710224
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Yuan Chang , Junhao Ge , Ying Pi , Cornelius Daniel Niculas , Yang Zheng , Steve Yun Zhang , Michelle Plavnik , Ethan Leveillee , Jing Cheng , Augustine Twum Kumi
IPC: G02B1/04 , C08G77/442 , B29D11/00 , G02C7/04
Abstract: The invention is directed to an embedded hydrogel contact lens, which comprises an insert sandwiched between two layers of hydrogel materials and can be produced according to a cast molding method including the procedures involving two females halves (FC1 and FC2) and two male halves (BC1 and BC2) and three consequential molding steps involving three molding assemblies: the 1st one formed between FC1 and BC1 for molding an insert; the 2nd one formed between FC1 and BC2 for molding a lens precursor having the molded insert embedded in a layer of a hydrogel material in a way that the front surface of the molded insert merges with the convex surface of the lens precursor; and the 3rd one formed between FC2 and BC2 for molding an embedded hydrogel contact of the invention.
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公开(公告)号：US20230339148A1
公开(公告)日：2023-10-26
申请号：US18306625
申请日：2023-04-25
Applicant: Alcon Inc.
CPC classification number: B29C39/026 , B29C39/006 , B29C39/021 , B29C39/26 , B29C39/36 , B29C39/028 , G02B1/043 , B29K2101/10
Abstract: The invention relates to a method for producing embedded hydrogel contact lenses each having an insert that comprises alignment features capable of capable of aligning the insert in depth and radial position in a female mold half during cast molding of an embedded hydrogel contact lens. The alignment features protrude from the front surface, are rotationally symmetric with respect to the central axis of the insert and independently have a shape having a curvature being greater than 2 folds of the curvature of the molding surface so as to minimize contacting area between the alignment features and the molding surface. The use of such an insert can simplify the process for producing embedded hydrogel contact lenses and enable the process to be implemented readily in an automatic production.
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公开(公告)号：US11207854B2
公开(公告)日：2021-12-28
申请号：US16708685
申请日：2019-12-10
Applicant: Alcon Inc.
Inventor： Yeming Gu , Curtis Dean McKenney , Cornelius Daniel Niculas
Abstract: A method of manufacturing of an astigmatic contact lens having a toric portion and a thickness differential feature to provide lens orientation on eye portion such that said thickness differential causes the toric portion of the contact lens to properly orient in the eye of the wearer. The toric lenses are manufactured by an effective process control method for cylinder power in toric lens production by determining an amount of a mold cylinder compensation which is caused by processes in a toric lens manufacturing system including tool making, injection molding, casting and curing, wherein the mold cylinder is defined as the difference in measured radius of curvature at two orthogonal directions. A control metric is established by using the amount of a mold cylinder compensation and tolerance range and reject mold out of the control limits and improve the production yield for toric lens manufacturing.
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公开(公告)号：US12194699B2
公开(公告)日：2025-01-14
申请号：US17710199
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Zahra Bassampour , Chandana Kolluru , Steve Yun Zhang , Junhao Ge , Yang Zheng , Cornelius Daniel Niculas , David Andrew Icenogle , Jing Cheng , Yuan Chang , Augustine Twum Kumi , Michelle Plavnik
Abstract: The invention relates to a method for producing embedded hydrogel contact lenses involving a set of 3-mold halves consisting essentially of: one female lens mold half having a molding surface defining the anterior surface of a contact lens; one male lens mold half having a molding surface defining the posterior surface of the contact lens; and an insert mold half having a molding surface defining one of the front and back surfaces of an insert. One of the lens mold halves is used twice: first with the insert mold half for molding an insert during first curing process and then with the other lens mold half for molding an embedded hydrogel contact lens with the molded insert embedded partially or fully therein during second curing process. The invention also relates to embedded hydrogel contact lenses produced from a method of the invention.
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公开(公告)号：US20220324187A1
公开(公告)日：2022-10-13
申请号：US17710199
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Zahra Bassampour , Chandana Kolluru , Steve Yun Zhang , Junhao Ge , Yang Zheng , Cornelius Daniel Niculas , David Andrew Icenogle , Jing Cheng , Yuan Chang , Augustine Twum Kumi , Michelle Plavnik
Abstract: The invention relates to a method for producing embedded hydrogel contact lenses involving a set of 3-mold halves consisting essentially of: one female lens mold half having a molding surface defining the anterior surface of a contact lens; one male lens mold half having a molding surface defining the posterior surface of the contact lens; and an insert mold half having a molding surface defining one of the front and back surfaces of an insert. One of the lens mold halves is used twice: first with the insert mold half for molding an insert during first curing process and then with the other lens mold half for molding an embedded hydrogel contact lens with the molded insert embedded partially or fully therein during second curing process. The invention also relates to embedded hydrogel contact lenses produced from a method of the invention.
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