Method of removing water from water base can sealant
AssigneeW. R. Grace & Co.
InventorRobert S. Holdsworth
Life of this patent
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Abstract
A method for removing water from water base can end lining compound after application without the use of a dryer. The method comprises the steps of arranging the lined can ends in a stack, wrapping the stacked can ends in a suitable absorbent material, and allowing the absorbent material to remove the water from the compound by absorption.
Claims22
In the process for lining can ends with a water base can end lining compound wherein the can ends are
- (1) introduced to a lining machine
- (2) lined
- (3) removed from the lining machine
- (4) arranged in stacks
- (5) allowed to dry
- the improvement which comprises enclosing the arranged stacked can ends in water absorbent material that does not come in contact with the water base can end lining compound on can ends interior of a stack, prior to any other substantive drying step whereby the need for an external source of heat for the purpose of drying is eliminated.
A method of removing water from water base can end lining compound after the compound has been applied to a plurality of can ends comprising the steps of
- (a) arranging the can ends in a stacked formation wherein the panel of a given can end is in contact with the panel of the can end which is adjacent to it,
- (b) enclosing said arranged can ends with a water absorbent material before said water has been substantially reduced in said water base can end lining compound and maintaining said water absorbent material out of contact with the water base can end lining compound on can ends interior of a stack.
A method of removing water from water base can end lining compound after the lining compound has been applied to a plurality of can ends and without employing an external source of heat or dehumidification comprising the steps of
- (a) arranging the lined can ends in a stack
- (b) covering the stacked can ends with a material which is capable of irreversibly absorbing 85 percent to 97 percent of the water initially present in the can end lining compound
- (c) placing said covered stacked can ends on a pellet
- (d) allowing the covering material to remain on said stacked can ends for a period of time sufficient to insure adequate drying while maintaining said covering material out of contact with the water base can end lining compound on can ends interior of the stack.
Dependencies are inferred from the claim text.