A desk top sealer includes three compartments for housing a solenoid
assembly, a power supply and a circuit board, respectively. A source of
air flow flows into an initial compartment and is channeled through
apertures in brackets forming the two remaining compartments for cooling
purposes and is exhausted from each compartment through a base. The
circuit board, upon actuation, provides RF energy to a fixed ceramic/metal
jaw to heat and weld plastic tubing clamped to the fixed jaw by a movable
jaw at ground potential. The movable jaw is guided during translation by a
pair of rods extending from a face plate, which rods also prevent rotation
of the movable jaw about its axis of translation to maintain the movable
jaw in alignment with the fixed jaw. The movable jaw is relatively massive
to serve as a heat sink for the heat of the tubing being welded and
includes a substantial surface area to dissipate to the ambient
environment any heat buildup that may occur. A face plate, supporting the
fixed and movable jaws, is configured to prevent flow of fluid from a
burst tubing into the sealer and the face plate may house indicator lamps
providing lights reflective of the operation being performed, which lights
are visible through a translucent part of the face plate.
