Apparatus for forming a pocketed spring unit, comprising a plurality of strings of pocketed springs and at least one cover sheet, comprises welding tools for welding together the pocketing material and the sheet. One of the welding tools is provided with a cutter for cutting the pocket prior to welding. The tool travels in the direction of Arrow A1, so that the cutter penetrates the pocketing material substantially centrally at the circular proximal end face of the pocket. Once inside the pocket, the tool moves axially through the centre of the spring until it reaches the distal end face of the pocket. Before the end face is reached, the piercing member becomes retracted in the direction of Arrow A2, so that the blade does not pierce the distal end face of the pocket.

Apparatus for forming a pocketed spring unit, comprising a plurality of strings of pocketed springs and at least one cover sheet, comprises welding tools for welding together the pocketing material and the sheet. One of the welding tools is provided with a cutter for cutting the pocket prior to welding. The tool travels in the direction of Arrow A1, so that the cutter penetrates the pocketing material substantially centrally at the circular proximal end face of the pocket. Once inside the pocket, the tool moves axially through the centre of the spring until it reaches the distal end face of the pocket. Before the end face is reached, the piercing member becomes retracted in the direction of Arrow A2, so that the blade does not pierce the distal end face of the pocket.

The seal plate assembly of this invention includes a base plate, an insulator pad positioned on the base plate, an electric heater pad positioned on the insulator pad and a pair of seal plates positioned on the electric heater pad, all of which have registering vacuum openings formed therein. The base plate, insulator pad, heater pad and seal plates are bolted together. The seal plates have spaced-apart cavities formed therein. A support plate is positioned in each of the cavities with each of the support plates having a length and width which is less than the length and width of the respective cavity to create a vacuum space at the perimeter of the support plates. The support plates are spaced above the bottom of the cavities.

The seal plate assembly of this invention includes a base plate, an insulator pad positioned on the base plate, an electric heater pad positioned on the insulator pad and a pair of seal plates positioned on the electric heater pad, all of which have registering vacuum openings formed therein. The base plate, insulator pad, heater pad and seal plates are bolted together. The seal plates have spaced-apart cavities formed therein. A support plate is positioned in each of the cavities with each of the support plates having a length and width which is less than the length and width of the respective cavity to create a vacuum space at the perimeter of the support plates. The support plates are spaced above the bottom of the cavities.

A heat sealing apparatus includes: a first sealing unit and a second sealing unit which are provided to be capable of being opened and closed and perform a heat sealing process of a bag while nipping the bag in a state where the first sealing unit and the second sealing unit are arranged in a closed position with the bag positioned between the first sealing unit and the second sealing unit; and a heat shield member including a heat reflector which is provided to cover at least a part of the first sealing unit and the second sealing unit arranged in the closed position, at a position away from the first sealing unit and the second sealing unit.

A system includes a film processing module, a processor, and memory. The processor and memory are in communication with the film processing module. The processor is configured to dynamically coordinate movement of the film processing module relative to a moving web of film and to perform a function on the web of film with the film processing module.

A control circuitry (11) comprises an adjustable capacitor (C1), and a bias source (111) configured to apply a bias voltage (V2) to said adjustable capacitor (C1) to adjust a capacitance value of the adjustable capacitor (C1). Such a control circuitry may for example be part of a sealing device (1) to seal a medical tubing (2), the sealing device (1) comprising a receptacle (100) to receive said medical tubing (2), the receptacle (100) comprising an electrode arrangement for causing a heat action on the tubing (2).

A control circuitry (11) comprises an adjustable capacitor (C1), and a bias source (111) configured to apply a bias voltage (V2) to said adjustable capacitor (C1) to adjust a capacitance value of the adjustable capacitor (C1). Such a control circuitry may for example be part of a sealing device (1) to seal a medical tubing (2), the sealing device (1) comprising a receptacle (100) to receive said medical tubing (2), the receptacle (100) comprising an electrode arrangement for causing a heat action on the tubing (2).

A method and apparatus for attaching a branch polymeric fitting to a host polymeric pipe in which a flexible heating blanket is inserted between and used to heat the respective branch and host pipe surfaces. When the parts reach the appropriate temperature, the pipes are separated a small distance and the heating blanket is removed. The branch fitting and host pipe are then fused by placing the heated pipe ends in contact and applying pressure.

A method and apparatus for attaching a branch polymeric fitting to a host polymeric pipe in which a flexible heating blanket is inserted between and used to heat the respective branch and host pipe surfaces. When the parts reach the appropriate temperature, the pipes are separated a small distance and the heating blanket is removed. The branch fitting and host pipe are then fused by placing the heated pipe ends in contact and applying pressure.