Provided are a welding device and a welding method that can avoid occurrence of a clearance in a side region of a member and suppress occurrence of a failure of the member due to such a clearance. The embodiment includes: an electrode 11 configured to supply electricity to an electroconductive element 23 arranged between members 21, 22 and configured to generate heat by current conduction; and a pressing element 12 arranged in a side region of one member 22 of the members 21, 22 and configured to press the electroconductive element 23 while elastically being in close contact with the one member 22. Further, the pressing element 12 comes into close contact with the one member 22 by being pushed against the electroconductive element 23 and expanding in a direction orthogonal to a pushing direction.

A method of securing a first component part and a second component part together, the method comprising providing an electrically conductive member between a first surface of the first component part and a facing first surface of the second component part and securing the first and second components together by passing a current through the electrically conductive member. The electrically conductive member is distributed across at least 50% of the surface area of the first surface of the first component part.

A heating circuit for joining disposed between members includes a heating wire; and a plurality of projections projecting from the heating wire in a facing direction in which the members face each other. Each length of the plurality of projections in the projecting direction is not less than half a layer thickness of a fused layer obtained by the members being melted.

A method of securing a first component part and a second component part together, the method comprising providing an electrically conductive member between a first surface of the first component part and a facing first surface of the second component part and securing the first and second components together by passing a current through the electrically conductive member. The electrically conductive member is distributed across at least 50% of the surface area of the first surface of the first component part.

A method of securing a first component part and a second component part together, the method comprising providing an electrically conductive member between a first surface of the first component part and a facing first surface of the second component part and securing the first and second components together by passing a current through the electrically conductive member. The electrically conductive member may comprise a first portion connectable to a source of current and a second portion electrically connected to the first portion and comprising a plurality of sub-conductive members. The electrically conductive member may be distributed across at least 50% of the surface area of the first surface of the first component part.

Assemblies, apparatus, and methods for heat sealing and monitoring are disclosed. A dual heat-sealing system includes a heat seal bar assembly with process monitor that allows to quickly change out heat bands and ensure that the effective length of the heat band matches the width of the seal (of the material being sealed), providing consistent and superior seal quality. A heat seal bar assembly includes multiple heat bars sized to easily match the size of the pouch being sealed. The heat bars are removable and replaceable. The heat bars are provided with at least one memory chip. The memory chip allows for storage and retrieval of information regarding the replaceable heat bar.

A method of securing a first component part and a second component part together, the method comprising providing an electrically conductive member between a first surface of the first component part and a facing first surface of the second component part and securing the first and second components together by passing a current through the electrically conductive member. The electrically conductive member may comprise a first portion connectable to a source of current and a second portion electrically connected to the first portion and comprising a plurality of sub-conductive members. The electrically conductive member may be distributed across at least 50% of the surface area of the first surface of the first component part.

Assemblies, apparatus, and methods for heat sealing and monitoring are disclosed. A dual heat-sealing system includes a heat seal bar assembly with process monitor that allows to quickly change out heat bands and ensure that the effective length of the heat band matches the width of the seal (of the material being sealed), providing consistent and superior seal quality. A heat seal bar assembly includes multiple heat bars sized to easily match the size of the pouch being sealed. The heat bars are removable and replaceable. The heat bars are provided with at least one memory chip. The memory chip allows for storage and retrieval of information regarding the replaceable heat bar.