Abstract: In a skin packaging machine, a mechanism for raising and lowering the film frame. The mechanism includes a single vertical post, a vertical shaft alongside the post, a carriage assembly slidably mounted on the vertical shaft. A laterally projecting arm and slide block cooperate with a slide rail on the vertical post to prevent the swiveling or rotating of the assembly as it rides up and down the shaft. A chain passing around upper and lower sprockets is driven by a reversible alternating current motor. The chain is connected to the carriage assembly through two series connected springs. The springs serve as chain tensioners as well as shock absorbers in the event that the assembly, including the frame, engages an object during its upward or downward excursion.

Abstract: A film heating oven for a skin packaging machine. The oven has a metallic housing in which are supported a plurality of elongated heaters in spaced parallel relationship. The heaters are energized by a control system which raises their temperature for heating the film and lowers the temperature during other operations of the machine. The housing includes a reflector for each tube to direct the heat downwardly onto the film and further includes an outer covering of insulation to minimize the escape of heat.

Abstract: A work control apparatus in a bicycle exerciser having a driven member rotatively mounted on a exerciser frame. The work control apparatus includes a housing mounted to the frame and providing support for a spring loaded, pivotally mounted lever connected to a brake assembly for selectively determining the braking pressure exerted on the driven member. A sliding member is mounted to an inclined bearing plane on the housing, and is selectively engageable with a bearing portion of the lever to hold it in a predetermined position. The lever bearing portion is rotatable about the pivot axis to define an acute axis of intersection with the inclined bearing plane, facilitating the bearing engagement of the sliding member and the engagement of the sliding member with the lever provides a visual indication of the pressure exerted on the driven member by the brake assembly.

Abstract: A work control apparatus in a bicycle exerciser having a driven member rotatively mounted on an exerciser frame, the work control apparatus having a rotatively mounted knob connected to a brake for the driven member for selectively determining the braking pressure exerted on the driven member, the knob being drivingly connected to a rotatively mounted wheel for rotating the wheel an angular distance less than the corresponding angular distance of the knob upon rotation of the knob incident to adjusting the braking pressure. An indicator on the wheel indicates the braking pressure applied by the brake to the driven member at a particular rotatively adjusted position of the knob. The knob and wheel are interconnected to intermittently engage to rotate the wheel in stepped angular increments upon continuous angular movement of the knob. The connection between the knob and wheel is provided by a plurality of angularly spaced drive pins intermittently engaging the wheel in a plurality of angularly spaced notches.