Sleeve-type closures for dispenser nozzles

a dispenser nozzle and closure technology, applied in the direction of caps, liquid handling, sustainable manufacturing/processing, etc., can solve the problems of high undesirable, waste of resources, and inability to recycle a wide variety of sealant and mastic compositions, and achieve the effect of tight sealing
US20010048198A1Inactive Publication Date: 2001-12-06DULIN JACQUES M
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
DULIN JACQUES M
Publication Date
2001-12-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

Reusable sleeve closures comprising a flexible thin sleeve of film grade plastic which seals the nozzle of a partially used sealant, mastic or caulk-dispensing cartridge or squeeze tube to substantially retard the hardening of the remaining tube contents. The plastic film provides a vapor barrier against exit of water or organic solvent from the sealant composition, and / or retards diffusion of oxygen that could cause the composition to set. The film is preferably somewhat stretchable and without creep over time, so that the sleeve provides an extremely tight seal for a substantial distance along the nozzle, e.g. film grade polyolefin or polyvinylidene chloride copolymer plastic film. The sleeve length is preferably long enough to provide a head space for a visual and tactile indicator of content condition. Sleeves may be packaged with the cartridge, or provided after-market. A 4-mil film polyolefin sleeve preserves water-based acrylic caulk over 9 months.
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Description

[0001] The benefit is claimed under 35 USC .sctn. 119 (e) of the filing date of Provisional Application Ser. No. 60 / 179,585 filed Feb. 1, 2000 under the same title by the same inventor.FIELD

[0002] The invention relates to closures for nozzles of dispensing cartridges and squeeze tubes, more particularly to a flexible sleeve of plastic film that hermetically seals the nozzle of a fresh or partially-used sealant, mastic, adhesive, glazing or caulk-dispensing cartridge or squeeze tube so that the remaining unused contents do not set. The sleeve(s) may be packaged with the cartridge, or may be provided as an after-market replacement used alone or in combination with ordinary nozzle caps.

[0003] It is common practice to package sealant, mastic, adhesive, glazing, caulk and glue compositions in plastic or metal squeeze tubes, or plastic or plastic coated or impregnated paper cartridges which are adapted to be loaded into extrusion devices, ordinarily called caulking guns, in order to dispe...

Claims

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