An exemplary air cushion inflation machine includes: a first terminal connected to a direct current input; a second terminal; a reference resistor powered by the direct current input; an op-amp; and a transistor. The first terminal of the op-amp is connected to a variable voltage source and the second terminal of the op-amp is connected to the reference resistor. The transistor has a base connected to an output of the op-amp, an emitter connected to the reference resistor, and a collector connected to a first terminal of a sealing band apparatus having first and second terminals. A meltable material placed between the first and second terminals is melted by resistance of current flowing between the first and second terminals. The variable voltage source changes voltage based on a voltage drop measured across the first and second terminals by a voltage measurement device and the constant current.

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 device for welding electrofusion fittings, the device including a welding power supply with a communications interface, at least one connection cable connected to the welding power supply for connecting and heating a heating wire of an electrofusion fitting, and at least one removable extension cable is arranged on the at least one connection cable. The device is configured to provide a current or a voltage such that the current or the voltage is remains constant despite an increase in a resistance due to the connected extension cable.

A machine and method for making bags is described and includes a web traveling from an input section to a rotary drum, to an output section. The rotary drum includes at least one seal bar, having a sealing zone, and a weakening zone disposed within the single sealing zone. The single sealing zone may be a heated perforator, and may include a heating wire. The heating wire may be an NiCr wire stitched into holes in a cap or on the seal bar. Bushings may be disposed in the holes.

A blood bag sterile connection method includes the following steps: 1) placing blood bag tubes above the wire box, clamping positions to be cut by using the vascular clamps, and simultaneously moving the two vascular clamps in opposite directions; 2) heating the composite metal wire, and cutting the blood bag tubes by using the composite metal wire; 3) after cutting the blood bag tubes, aligning the blood bag tubes to be connected; 4) moving the two vascular clamps towards each other, rolling away the used composite metal wire, and rolling out a new composite metal wire; 5) connecting the blood bag tubes by heating the composite metal wire, and simultaneously moving the two vascular clamps towards each other; and 6) returning the wire box to the initial position, taking out the connected blood bag tubes, and returning the vascular clamps to the initial positions.

A low-temperature vacuum cooking device and a cooking appliance including low-temperature vacuum cooking device are provided. The cooking appliance may include a housing including a container mount and a vacuum-packing module mount provided adjacent to each other, a first container having a space to accommodate a liquid therein, the first container being configured to be coupled with the container mount, a heater that heats the liquid accommodated in the first container, a vacuum pressure generator installed on the vacuum-packing module mount to suction air inside a food packing bag, a sealer installed adjacent to the vacuum pressure generator that heats the food packing bag in order to seal it, a cover rotatably installed on the housing to cover or open the first container and the vacuum pressure generator, and a high-temperature cooking unit including a top plate and a high-temperature heater provided at a lower portion of the top plate.

A storage electric sealer comprises a casing, a sealing module, a spring switch, a support cover, a press bar, and a sliding plate. The casing and the sealing module are arranged on the casing. The support cover includes at least two containing grooves. The press bar provided with a sliding chute is pivotally connected with the pivoting holder of the casing. The sliding plate is provided with a heat insulation block and at least a stopper, both lateral side of the sliding plate being connected with the sliding chute of the press bar in a sliding manner. Wherein, the sliding plate is located at a closed position in storage state, so that the stopper is accommodated in the containing groove of the support cover. As such, the storage electric sealer can be transformed into a storage state by a modified sliding mechanism to reduce the volume and damage rate effectively.

A low-temperature vacuum cooking device and a cooking appliance including low-temperature vacuum cooking device are provided. The cooking appliance may include a housing including a container mount, a first container having a space to accommodate a liquid therein, the first container being configured to be coupled with the container mount, a heater that heats the liquid accommodated in the first container, a cover rotatably installed on the housing to cover or open the first container.

A machine and method for making bags is described and includes a web traveling from an input section to a rotary drum, to an output section. The rotary drum includes at least one seal bar, having a single sealing zone, and a weakening zone disposed within the single sealing zone. The single sealing zone may be a heated perforator, includes a heating wire. The heating wire may be an NiCr wire stitched into the heater, and be disposed on a cap or on the seal bar. The weakening zone may create a line of weakness that is uniform or varies in intensity. The sealing zone may include temperature zones, cartridge heaters, cooling air, or heated air, or a source of ultrasonic, microwave or radiative energy.

An electroweld fitting is made of plastic material for welding plastic pipelines. The electroweld fitting has: a cylindrical body having a longitudinal axis; a heating wire winding; contacts configured to conduct an electric current; and a pipe stop. The pipe stop is arranged on an inner lateral surface of the cylindrical body. The pipe stop is flexible and resilient. The cylindrical body and the pipe stop arranged thereon are a one piece injection molded part. The heating wire winding is an embedded wire in the inner lateral surface of the cylindrical body.