Appeal No. 2005-2176 Page 3
Application No. 10/266,229
1. A pump for use in a dispensing unit of a hot melt
adhesive system, the pump comprising:
a pump housing having an inlet, an outlet, and a
chamber between said inlet and said outlet;
a piston slidably disposed within said housing such
that motion of said piston draws adhesive into said inlet and
discharges adhesive from said outlet; and
a filter removably positioned in said chamber between
said inlet and said outlet to capture particulate material in the
hot melt adhesive as it is pumped from said inlet to said
outlet.
Reighard discloses an applicator system for melting thermoplastic material and
supplying the molten or liquid material under pressure to an applicator head or gun.
The system includes a machine 10 comprising a heated reservoir 14, a pneumatic
motor 15, a pump 16 and a manifold block 17. A combination filter, check valve and
relief valve cartridge 18 is removably located in the manifold block 17. Molten material
is supplied from the outlet port 100 of the manifold 17 to a heated dispensing gun 11
through a conduit 19. The pump 16 includes a piston 50 on the end of a piston rod 49,
actuated by the pneumatic motor 15, and a sleeve 45, the sleeve 45 having four radial
ports 70 which open into the bottom 40 of the reservoir 14. The sleeve 45 has an outlet
port 72 located in the bore 75 of the manifold block 17.
The law of anticipation does not require that the reference teach what the
appellant is claiming, but only that the claims on appeal "read on" something disclosed
in the reference (see Kalman v. Kimberly-Clark Corp., 713 F.2d 760, 772, 218 USPQ
781, 789 (Fed. Cir. 1983), cert. denied, 465 U.S. 1026 (1984)).
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