Patent ID: 6539187
Filing Date: 2003-03-25
Classification: G03G,Y10T

Abstract:
Tearable sealing member for unsealably sealing an opening of a developer container for containing a developer for an image forming apparatus, said tearable member comprising a seal film for closing the opening and a tearing member cooperating with the seal film for tearing a strip out of said seal film in a longitudinal direction, from a first end of the strip up to a second end of the strip, so as to define an opening, in which the seal film is provided with a means for controlling a minimum width of the strip to be torn out during at least its partial tearing, said control means defining at least a control tearing line selected from the group consisting of a at least partly curved control tearing line, a control tearing line with at least a portion extending in a direction forming an angle with respect to the longitudinal tearing direction and a control tearing line with a portion having at least a curved portion and a portion extending in a direction forming an angle with respect to the longitudinal tearing direction.