Dispensing – With heating or cooling means – Heating only
Patent
1984-04-17
1986-09-23
Rolla, Joseph J.
Dispensing
With heating or cooling means
Heating only
222263, 74128, 219421, 226 11, 226143, B67D 562
Patent
active
046130624
ABSTRACT:
This relates to a dispenser for a hot melt material which is supplied in rod-like form from a spool and which is heated to the required semi-liquid dispensing state. The dispensing head is provided with a heating passage which provides for uniform heating of the rod-like hot melt material and there is further provided a special piston having a throughbore through which hot melt material is fed into a pumping cylinder as the piston retracts after a pumping stroke so as to eliminate in the dispensing head downstream of the piston any momentary voids. There is also a feed mechanism which will feed the hot melt material in accordance with the demand of the dispensing head and which will urge the rod-like hot melt material into the heating passage of the dispensing head under a preselected pressure so as to assure flow not only through the heating passage, but also through the piston. There are also provided means for detecting the existence of the rod-like hot melt material in advance of the feed mechanism to make certain that the apparatus be shut down when no hot melt material supply is available. There is also provided a reverse drive unit for retracting the previously fed hot melt material a short distance to relieve the build-up of pressure in the heating passage when the dispensing operation is momentarily shut down and heat is still being applied to the hot melt material disposed within the heating passage.
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Kubis Charles S.
Roth Donald J.
Walter John
Brown Charles E.
Continental Can Company Inc.
Handren Frederick R.
Rolla Joseph J.
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