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Marking apparatus for contact lens
| Details |
Inventors: Yamamoto, Yasuyoshi; Kosaka, Chikai; Miyamura, Kazuya;
Assignee: Menicon Co., Ltd. (Aichi, JP)
Primary Examiner: Burr; Edgar S.
Assistant Examiner: Funk; Stephen R.
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak & Seas
A marking apparatus for providing desired marks such as characters, symbols, graphics, etc. on surfaces of contact lenses in a standardized manner. The marking apparatus includes a main shaft rotatable about an axis and a screen support mounted on the main shaft so as to be rotated therewith. The screen support has a plurality of marking holes provided at equal intervals around a circumference thereof and a screen is stretched across the support. The screen includes patterns associated with the desired mark which are provided in correspondence with the marking holes. A bracket is mounted on the main shaft under the screen support so as to be rotated with the main shaft. A plurality of supporters are supported by the bracket and function to individually support lens beds on which the lenses are respectively disposed. The supporters are movable up and down between a position where the respective contact lenses mounted on the lens beds are brought into contact with corresponding patterns of the screen and a displaced position where the contact lenses can be mounted on or removed from the supporters. Finally, an injector placed above the screen support applies a print solution to the screen stretched in the corresponding one of the marking holes of the screen support. |
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DETAILED DESCRIPTION The present invention has been attained in view of the above problems and an object of the present invention is to provide a contact lens marking apparatus in which the marking process can be standardized so that marking mistakes can be reduced and overall marking efficiency improved.
To solve the above-mentioned problems, the gist of the present invention lies in a marking apparatus for marking contact lenses, comprising (a) a main shaft rotatable about an axis, (b) a screen support mounted on the main shaft so as to be rotated integral with the main shaft, the screen support including a plurality of marking holes provided on the circumference of one and the same circle with the main shaft as its center so as to be disposed at circumferentially equal intervals, the screen support being provided with a screen stretched thereon and having patterns provided correspondingly to the marking holes in accordance with a desired mark, (c) a bracket mounted on the main shaft under the screen support so as to be rotated integrally with the main shaft, (d) lens beds for mounting respective contact lenses to be subjected to marking, (e) a plurality of supporters for supporting the lens beds while being supported by the bracket so as to be movable up and down between a position where each of surfaces of the respective contact lenses mounted on the lens beds is brought into contact with the lower surface of the screen stretched in corresponding one of the marking holes of the screen support and a position where the contact lens can be mounted or removed, and (f) a separate injector placed above the screen support for applying a predetermined print solution on the screen stretched in the corresponding one of the marking holes of the screen support.
In the above-mentioned marking apparatus, preferably, each of the supporters is provided with an adjusting mechanism which can adjust a pressing force when the surface of the corresponding contact lens to be subjected to marking is brought into contact with the screen stretched in the corresponding marking hole of the screen support
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