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US4740194A Self-contained liquid swab applicator and method for its manufacture 失效
独立液体拭子涂抹器及其制造方法

Self-contained liquid swab applicator and method for its manufacture
Abstract:
A self-containing liquid swab applicator having a hollow tubing of a thin-walled plastic material for retaining therein a supply liquid and the material for being heat fusible, at least one end thereof being closed for securing retention of the supply liquid, one of the ends having an orifice adapted for exiting of the supply liquid, removable tab means secured upon the orifice for closure of the orifice until removed, and cotton form means permitting wicking and forming an environmental member about the orifice portion of the swab applicator for dispensing the supply liquid when the orifice is opened. The open end(s) may receive sequentially pulsing of alternate injections of supply liquid and air into one end of the tubing in measurable amounts and forming liquid lock portions and air lock portions along the tubing, and defining N segments of supply liquid spaced apart by air locks, and the segments may be cut apart at the air locks.
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