Abstract: A form, loop and trim system is provided with a toggle mechanism for dynamic counterbalancing. The system operates at high speed with reduced vibration. The system may be conveniently adjusted to handle products of different sizes, shapes and materials. An improved feed apparatus for indexing a sheet of thermoformed articles is also disclosed.

Abstract: A disconnect assembly releases a conveyor chain from a driven shaft. The connection between the driving shaft and the chain is by means of tapered pins associated with a driven plate or hub received in tapered holes on a plate attached to the driving shaft. The driven plate or hub carries a sprocket for the chain drive. An overload on the chain drive causes the tapered pins to ride out of the recesses. This activates a pressure cylinder that continues to withdraw the pins for a positive disconnect. Also, the pressure cylinder can bring about a disconnection on command. Limit switches detect a disconnect and then permit restarting the conveyor only when the chain and its drive are appropriately positioned. A set of disconnect plates located on the driving shaft engage rollers that both activate the disconnect and transmit its condition to the limit switches.

Abstract: A linkage includes a pair of links pivotally connected together near adjacent ends. The opposite end of one of the links pivots about an axis, moving the opposite end of the other link along a linear path. The position of the axis is adjusted along a linear path substantially parallel to the linear path traced by the opposite end of the other link.