Patent ID: 11919249
Assignee: CONVEYOR LIMITED
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 17:
18. A method of forming a series of discrete bonds in a bondable material, the method comprising:
rotating a roller of a rotary impulse sealer about an axis, the roller having a roller body and a plurality of seal bars extending radially outwardly from the roller and spaced apart around the roller body, at least one of the seal bars having a body and a selectively heatable heating element extending along at least a part of a length of the seal bar body;
introducing a bondable material to the roller using a tensioned belt of the rotary impulse sealer;
rotating the roller through a pre-heating pressure application region of the rotary impulse sealer in which the at least one seal bar applies pressure to a bond area of the bondable material, followed by a heating region of the rotary impulse sealer in which the at least one seal bar heats the bond area and applies more pressure in the heating region than the pressure applied during the pre-heating pressure application region, the regions being stationary with respect to the rotation of the roller; and
adjusting the speed of rotation of the roller relative to the bondable material such that the at least one seal bar moves at substantially the same speed as the bondable material while the seal bar applies pressure to the bond area.