Developer container and image forming system for accommodating powder or liquid contents
A developer container includes a pouch, a communication member, and a cap. A marking including an arrowhead part and a parting line are formed on an outer peripheral surface of the cap. A rear end of the arrowhead part is disposed between a first position that is a position 45° upstream from a reference position in a direction of rotation and a second position that is a position 45° downstream in the direction of rotation. The rear end of the arrowhead part overlaps the parting line.
1 . A developer container configured to accommodate a developer, comprising:
a pouch including an opening;
a communication member configured to make inside of the pouch communicate with outside, the communication member being fixed to the opening of the pouch; and
a cap configured to be detached from the communication member by rotation with respect to the communication member, the cap including a marking indicating a direction of rotation to detach the cap from the communication member, the marking including an arrowhead part formed to protrude from an outer peripheral surface of the cap, the outer peripheral surface being configured in a cylindrical shape, the arrowhead part including a rear side end portion located upstream and a front side end portion located downstream in the direction of rotation,
wherein a direction connecting the communication member and the pouch is a first direction, a longitudinal direction of a cross-sectional shape of the pouch is a second direction, the second direction being orthogonal to the first direction, and a direction orthogonal to the first direction and the second direction is a third direction,
wherein in a state of the cap attached to the communication member, the cap has a reference position on the outer peripheral surface, the reference position being a position in the second direction corresponding to where a thickness of the pouch in the third direction is maximized in a case where the pouch is viewed along the first direction, and
wherein a rear end of the rear side end portion is disposed along the outer peripheral surface at an angular position within a range from 45° upstream to 45° downstream from the reference position in the direction of rotation, with the rotation axis as a center of rotation,
wherein the front side end portion of the arrowhead part is formed such that a width in the first direction becomes narrower toward the downstream in the rotational direction, the marking further including a shaft part formed to protrude from the outer peripheral surface, the shaft part being continuous with the rear end of the rear side end portion of the arrowhead part and extending in the direction of rotation, the shaft part having a width narrower in the first direction than the rear side end portion.
2 . The developer container according to claim 1 , wherein the arrowhead part protruding from the outer peripheral surface has a height of 1.0 mm or less from the outer peripheral surface.
3 . The developer container according to claim 1 , wherein the cap includes a cap main body and a coupling unit disposed on an edge of the cap main body to couple the cap main body to the communication member, the coupling unit being configured to be sheared by a relative movement of the cap main body against the communication member in the direction of rotation.
4 . The developer container according to claim 3 , wherein the coupling unit is integrally formed with the cap main body and located on the outer peripheral surface at a position 90° upstream or a position 90° downstream from the rear end of the rear side end portion in the direction of rotation with the rotation axis as the center of rotation.
5 . The developer container according to claim 3 , wherein the coupling unit includes a coupling portion and a plurality of connecting portions, the coupling portion being coupled and fixed to the communication member, the plurality of connecting portions each being coupled to the cap main body at one end and to the coupling portion at the other end, and wherein two adjoining connecting portions are located at a predetermined distance or more from each other in the direction of rotation.