Package making – Interrelated or safety controls
Patent
1976-07-13
1978-03-07
Simpson, Othell M.
Package making
Interrelated or safety controls
53 41, 53 42, B65B 728, B65B 6118
Patent
active
040771784
ABSTRACT:
A container such as a metal top can containing a liquid to be dispensed by perforating the can top has an annular metal top having a concentric opening sealed with an easily perforatable thin film material. The thin film material extends across adjacent to the undersurface of the annular metal top and is sandwiched between the container top and the can body at the rim in a usual rim bead crimping operation, which leaves a projecting edge portion of the thin film outside of the rim. This edge of the film is then melted away by a hot sleeve or by spinning the sealed can relative to a hot element. The thin film material, which may be a polyester plastic, is selected to be sufficiently strong to protect the container contents during normal handling yet is more readily perforatable than the container top itself would be. The container finds extremely advantageous utility with apparatus in which the top perforator is also a conduit for dispensing the container contents and for which the container serves as a reservoir during the dispensing operation, for example in holding and dispensing paint in pint and quart size cans. The preferred range of size for the film-covered opening in the can top is from 20% to 65% of the diameter of the top.
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Nelson Charles J.
Nelson Evan S.
Culver Horace M.
Simpson Othell M.
The Nelson Company
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