Viscosity control and colorant circulation for printing lens molds

Disclosed are systems including a colorant cup that is adjacent to a clich¿ª, wherein the cup includes a vent, an interior roof portion, and an air gap beneath the roof portion; a reservoir containing colorant; a feed conduit in fluid communication with the reservoir; and a return conduit in fluid c...

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Bibliographische Detailangaben
1. Verfasser:	WIDMAN MICHAEL F.,POWELL PAUL MARK,FLEMING AIDAN,RYAN JOSEPH
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BOTTLES, JARS OR SIMILAR CONTAINERS DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISEPROVIDED FOR INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LINING MACHINES LIQUID HANDLING MEASURING OPENING, CLOSING PERFORMING OPERATIONS PHYSICS PRINTING PRINTING MACHINES OR PRESSES PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STAMPS TESTING TRANSPORTING TYPEWRITERS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Disclosed are systems including a colorant cup that is adjacent to a clich¿ª, wherein the cup includes a vent, an interior roof portion, and an air gap beneath the roof portion; a reservoir containing colorant; a feed conduit in fluid communication with the reservoir; and a return conduit in fluid communication with the cup. Also disclosed are various methods in which colorants are transferred in the disclosed systems from the reservoir to the colorant cup. The disclosed systems, colorant cups and methods are useful in the preparation of tinted contact lenses.