METHOD AND DEVICE FOR FORMING TIGHT CONNECTION AND USE OF ABOVE METHOD Russian patent published in 2009 - IPC B31B37/60 B29C65/00 

FIELD: production processes.

SUBSTANCE: method is intended for making a connection in section of plastic material cloth. At that, the above material cloth includes the first elongated section with the first number of material layers and the second elongated section with the second number of material layers. At that, at least one of the above material layers is included in both the first and the second sections. The above cloth section is of length at which it crosses the passage from the first section to the second section of material cloth. At that, method involves connection phase, in the above section, of opposite surfaces of cloth layers to each other. The above cloth section is located between support and connecting tool. At that, at least one of elements, either support or connecting tool, includes cavities. Then support and connecting tool are brought together in order to form protrusions and cavities by moving material in the above section to cavities. And finally, protrusions and cavities are directed so that they have the length at which they cross the above passage. Group of inventions also refers to use of the above method for manufacturing container workpiece, and also to device ensuring production of the above connection.

EFFECT: group of inventions provides production of reliable and tight connection in relation to liquid.

15 cl, 8 dwg