초록 ▼

A method for sealing a cylindrical or truncated cone shaped container body the lower end of which is sealed with a base, comprising the steps of pouring a liquid into said container body through its upper open end to a predetermined level, slightly deforming upwards said base, and thereafter sealing

A method for sealing a cylindrical or truncated cone shaped container body the lower end of which is sealed with a base, comprising the steps of pouring a liquid into said container body through its upper open end to a predetermined level, slightly deforming upwards said base, and thereafter sealing the upper open end of said container body.

대표청구항 ▼

A method for sealing a cylindrical or truncated cone-like container body including a paper material as a main structure material, the lower end of which is sealed with a base, comprising the steps of: pouring a hot liquid into said container body through its upper open end to a predetermined level;

A method for sealing a cylindrical or truncated cone-like container body including a paper material as a main structure material, the lower end of which is sealed with a base, comprising the steps of: pouring a hot liquid into said container body through its upper open end to a predetermined level; slightly deforming upwards said base while not deforming said container body; thereafter sealing the upper open end of said container body while said base is deformed upwards; permitting said base to deform outwardly or downwardly due to the weight of the liquid and a high gas pressure created by the hot liquid in the head space within said container body; and permitting said base to deform inwardly or upwardly due to vacuum within the head space as the liquid cools; whereby no pinholes or leaks are formed at the sealed portion of the upper end of said container body and a good appearance of said container body is obtained.