# US 11,298,947 B2 · Ink container > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,947 B2 - Document ID: US11298947B2 - Status: Granted - Kind: B2 - Application number: 17/006,302 - Filed: 2020-08-28 - Published: 2021-03-04 - Granted: 2022-04-12 - Earliest claimed: 2019-08-29 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Yoshiaki Shimizu; Tadahiro Mizutani; Taku Ishizawa - Web page: https://patentgrep.com/patent/US11298947B2 ## CPC - B41J 2/17523: {Ink connection} - B41J 2/17553: {Outer structure} - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS ## Abstract An ink container includes: a container body that contains ink; and an ink outlet forming portion that has an ink outlet. The container body includes a first connection portion provided around an opening. The ink outlet forming portion includes a second connection portion connectable to the first connection portion. The first connection portion includes a first screw forming portion provided on an outer surface. The second connection portion includes a second screw forming portion provided on an inner surface and configured to be brought into thread engagement with the first screw forming portion. The container body and the ink outlet forming portion include a stopper located inside an outer circumference of the second connection portion in a radial direction, the center of which is a center axis of the first connection portion and the second connection portion. ## Claims ### Claim 1 An ink container, comprising: a container body that contains ink; and an ink outlet forming portion that has an ink outlet, wherein the container body includes a first connection portion provided around an opening, the ink outlet forming portion includes a second connection portion connectable to the first connection portion, the first connection portion includes a first screw forming portion provided on an outer surface, the second connection portion includes a second screw forming portion provided on an inner surface and configured to be brought into thread engagement with the first screw forming portion, the container body and the ink outlet forming portion include a stopper located inside an outer circumference of the second connection portion in a radial direction, the center of which is a center axis of the first connection portion and the second connection portion, the ink outlet forming portion is connected to the container body in a connection direction parallel to the center axis, and the stopper includes a first convex portion provided on the first connection portion, and includes a second convex portion provided on a distal end of the second connection portion in the connection direction and configured to engage with the first convex portion. ### Claim 2 (depends on 1) The ink container according to claim 1, wherein in the ink outlet forming portion, a through hole going through the second connection portion in the radial direction is provided at an opposite position relative to the second convex portion in the connection direction. ### Claim 3 (depends on 1) The ink container according to claim 1, wherein the stopper includes a third convex portion provided at the first screw forming portion and having a height not greater than a height of a first thread of the first screw forming portion in the radial direction, and includes a second thread provided on the second connection portion and configured to engage with the third convex portion. ### Claim 4 (depends on 3) The ink container according to claim 3, wherein the first screw forming portion includes a first root along which the second thread passes when the second screw forming portion is screwed onto the first screw forming portion, and the third convex portion is provided in such a way as to intersect with a path of the second thread. ### Claim 5 (depends on 3) The ink container according to claim 3, wherein the ink outlet forming portion is connected to the container body in a connection direction parallel to the center axis by being rotated with respect to the container body in a screw tightening direction, in the ink outlet forming portion, a slit going through the second connection portion in the radial direction is provided, and when in a state of engagement of the third convex portion with the second thread, the slit is provided on at least one of two positions between which the second thread is provided in the connection direction. ### Claim 6 (depends on 5) The ink container according to claim 5, wherein a leading portion of the slit in the screw tightening direction is located ahead of the second thread, and a trailing portion of the slit behind the leading portion in the screw tightening direction is adjacent to the third convex portion in the connection direction when in the state of engagement of the third convex portion with the second thread. ### Claim 7 An ink container, comprising: a container body that contains ink; and an ink outlet forming portion that has an ink outlet, wherein the container body includes a first connection portion provided around an opening, the ink outlet forming portion includes a second connection portion connectable to the first connection portion, the first connection portion includes a first screw forming portion provided on an outer surface, the second connection portion includes a second screw forming portion provided on an inner surface and configured to be brought into thread engagement with the first screw forming portion, the container body and the ink outlet forming portion include a stopper located inside an outer circumference of the second connection portion in a radial direction, the center of which is a center axis of the first connection portion and the second connection portion, and the stopper includes a third convex portion provided at the first screw forming portion and having a height not greater than a height of a first thread of the first screw forming portion in the radial direction, and includes a second thread provided on the second connection portion and configured to engage with the third convex portion.