Appeal 2006-3345
Application 10/256,982
Kujubu discloses that the slide rings 27 and 28 are connected to a power
source by way of carbon terminals suspended from a support member 29 fixed to
the hollow shaft 19, limit switches, and other parts (Kujubu, col. 6, ll. 57-61).
Kujubu discloses that the slide ring 27 is divided into equal divisions of the
same number as the number of vacuum boxes 22 and is adapted to distribute power
to only parts necessary for an impulse seal power source (Kujubu, col. 6, ll. 61-64).
Kujubu discloses that the machine, in operation, forms a vacuum box 22 and
evacuates the interior of the vacuum box 22 (Kujubu, col. 8, ll. 35-40).
Kujubu discloses that “when the desired degree of vacuum within the bag 1
has been obtained,” “the heater head 51 descends and clamps the bag 1 between
itself and the elastic seat 47.” (Kujubu, col. 9, ll. 11-20).
Kujubu discloses that after the bag has been clamped by the heater head 51,
the limit switch, which controls the connection of the lead wires of the heater
components to the power source, is turned “ON” so that electric current is passed
through the heater strip 72 and the heater wire 74, whereupon the bag 1 is heat
sealed (Kujubu, col. 9, ll. 21-24).
Thus, Kujubu discloses that the heater head 51, heater strip 72, and heater
wire 74 are connected to a source of current to generate heat only when the limit
switch is turned “ON.”
Kujubu discloses that the limit switch is turned on after the vacuum box 22
has been evacuated and after the heater head 51 has closed and clamped the bag for
sealing.
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