초록 ▼

In a method of shrinking screw caps (2) on to the mouths (1) of containers (13), the screw caps are acted upon by a hot gas jet (7, 8) from nozzles (3, 4), along a feed path (6), from both sides. The flow axes (7, 8) are displaced relative to each other so that there are no pressure build-up and sta

In a method of shrinking screw caps (2) on to the mouths (1) of containers (13), the screw caps are acted upon by a hot gas jet (7, 8) from nozzles (3, 4), along a feed path (6), from both sides. The flow axes (7, 8) are displaced relative to each other so that there are no pressure build-up and stagnation effects. The resulting advantageous temperature pattern at the nozzles means that savings in heating output can be attained. In addition, there is no longer any need for the bottles to be rotated about their own axis (10).

대표청구항 ▼

A method of generally symmetrically shrinking a generally cylindrical portion of a closure cap of plastic material on to the generally cylindrical mouth of a container, characterised in that the mouth (1) of the container is first closed by the closure cap (2), and that the closure cap is then acted

A method of generally symmetrically shrinking a generally cylindrical portion of a closure cap of plastic material on to the generally cylindrical mouth of a container, characterised in that the mouth (1) of the container is first closed by the closure cap (2), and that the closure cap is then acted upon by means of hot jets of gas (5) from at least two nozzles (3, 4) alternately in such a way that the gas jets impinge on the closure cap in a temporally and/or spatially displaced mode and do not impinge on each other, wherein the direction of flow of at least two of the gas jets which occur in succession in respect of time or space is different so as to impinge on different portions of the same periphery of said closure cap.