METHOD FOR PRINTING IRIS PATTERN ON CONTACT LENSES

A method of tinting soft contact lenses (L) uses at least one transfer-pad printer (2) including a suitable ink of the desired tint, and at least one printing block (6) carrying an iris pattern. The contact lenses are attached to lens mounts (14), preferably by being shrunk onto curved heads (18) of...

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Bibliographische Detailangaben
1. Verfasser:	STERMAN, S
Format:	Patent
Sprache:	eng
Schlagworte:	COLOUR PRINTING CONTACT LENSES LINING MACHINES OPTICS PERFORMING OPERATIONS PHYSICS PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SPECTACLES STAMPS SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES TRANSPORTING TYPEWRITERS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A method of tinting soft contact lenses (L) uses at least one transfer-pad printer (2) including a suitable ink of the desired tint, and at least one printing block (6) carrying an iris pattern. The contact lenses are attached to lens mounts (14), preferably by being shrunk onto curved heads (18) of the mounts, and are then aligned, in turn, with the pad (4) of the transfer-pad printer (2). For each lens, the printing block (6) is inked, the pad is caused to pick up the iris pattern from the inked block, and the pad is then caused to make contact with the mounted lens, thereby transferring the iris pattern as picked up from the block to the mounted contact lens. Apparatus for carrying out the method is also described.