Dispensing – Motor operated outlet element
Reexamination Certificate
2006-04-24
2009-11-10
Jacyna, J. Casimer (Department: 3754)
Dispensing
Motor operated outlet element
C222S146500, C222S509000, C222S001000, C137S625650, C137S625660, C137S625690
Reexamination Certificate
active
07614529
ABSTRACT:
A spool valve and valve seat assembly disposed in the control module of a hot melt adhesive dispensing system is uniquely structured so as to effectively prevent fluid communication or “cross-talk” between a first dispensing outlet port and a second recirculation port, during those periods when the control module is effectively reciprocally cycling the spool valve between its oppositely disposed extreme conditions for alternatively permitting the hot melt adhesive material to be dispensed from the first outlet port or for re-routing the hot melt adhesive material through the recirculation passage so as to prevent the hot melt adhesive from being improperly dispensed as a result of being undesirably routed to the recirculation passage.
REFERENCES:
patent: 4485846 (1984-12-01), Neff
patent: 6089413 (2000-07-01), Riney et al.
patent: 6171089 (2001-01-01), Oehman, Jr.
patent: 6422428 (2002-07-01), Allen et al.
patent: 6688498 (2004-02-01), McGuffey
patent: 6772791 (2004-08-01), Neff
patent: 2002/0139818 (2002-10-01), McGuffey
patent: 2004/0099752 (2004-05-01), Boger
Bolyard, Jr. Edward W.
Bourget Daniel D.
Illinois Tool Works Inc.
Jacyna J. Casimer
Law Offices of Steven W. Weinrieb
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