Abstract: A seal-actuating mechanism, which when mounted in a wall panel of the type having channel-shaped opposed frame members can be installed, replaced or repaired without removing the exterior finished surface of the wall panel. The seal-actuating mechanism includes a rotatable shaft mounted between the opposed frame members and an operator member including pivot lever means is mounted on each end thereof. At least one tension member is disposed in the cavity of each frame member, one end of which is coupled to the pivot lever means, and the other end is coupled to the shiftable seal assembly so that when the shaft is rotated the seal assembly is shifted respectively from an extruded unlatched position to its retracted latched position.

Abstract: A self-plumbing, counter-rotating trolley and track suspension system for supporting an operable wall panel is disclosed. The suspension system comprises a trolley assembly, including a pendant bolt to provide a common axle on which a pair of counter-rotating discs are rotatably mounted in spaced apart alignment. The track-contacting surface of each disc is spherically formed, with each surface generated from a common centerpoint but having unequal radii so that the surfaces generated by the radii have curvatures which are similar but are not congruent. The suspension system also includes a track having a pair of vertically spaced and diametrically arranged rails, each rail defining a cylindrical surface which is generated from the same common centerpoint of that of the discs, the locus of which lies above the rail-contacting surface of the upper disc.

Abstract: A device for sealing plastic material bags having opposed jaw members movable between open and closed positions with one of the jaw members provided with a heat source and the opposed jaw member provided with a resilient jaw surface. One of the jaw members is stationary, the other jaw member is movable and is attached adjacent one end of a lever member pivoted intermediate its ends, the other end being associated with an electro-magnet with switch means for actuating the electro-magnet, the switch being actuated by manual movement of the movable jaw towards the stationary jaw. Activation of the switch controls electronic circuitry including timing means to actuate the electro-magnet to forcibly close the jaws and maintain them in a closed condition until interruption of power to the electro-magnet by a timing circuit. The movable jaw is normally biased away from the stationary jaw.