Abstract: A tank includes a first storage chamber, a second storage chamber, a first communication part to which a first liquid bottle is connectable, and a second communication part to which a second liquid bottle is connectable. The first storage chamber is defined by a first surface and a second surface facing the first surface in a first direction. The second storage chamber is defined by a third surface and a fourth surface facing the third surface in the first direction. The first and second storage chambers are juxtaposed in the first direction. In the first direction, a center of the first communication part in the first direction is offset from a center of the first storage chamber in the first direction. In the first direction, a center of the second communication part in the first direction is offset from a center of the second storage chamber in the first direction.

Abstract: A printing liquid container includes first and second members having a supply port and a valve, respectively. The members rotate with respect to each other between first and second states. The valve closes and opens the supply port in the first and second states, respectively. The first and second members have first and second fitting portions, respectively. The fitting portions fit to a fitted portion of a tank in the first state. The second fitting portion allows rotation of the second member with respect to the fitted portion when the first fitting portion are fitted to the fitting portion. The first member does not rotate together with the second member due to fitting between the fitted portion and the first fitting portion. The second member cannot be removed from the fitted portion due to fitting of the second fitting portion to the fitted portion in the second state.

Abstract: An ink container is provided. The ink container includes a main body. The main body includes a first key portion and a second key portion. The first key portion is positioned on a first outer surface of the main body. The second key portion is positioned on a second outer surface.

Abstract: A liquid cartridge includes a housing that has a cylindrical portion and a first valve mechanism at least partially accommodated in the cylindrical portion. The housing is blow molded with air blown from an air nozzle. At least a part of an inner surface of the cylindrical portion is a transfer surface to which an outer peripheral surface of a mold is transferred.

Abstract: An ink container includes a front wall, a rear wall, a first sidewall, and a second sidewall. The front wall faces frontward in an attachment direction of the ink container. The rear wall is spaced apart from the front wall in a rearward direction opposite the attachment direction. The first sidewall is positioned between the front wall and the rear wall. The second sidewall is positioned between the front wall and the rear wall, and spaced apart from the first sidewall. The front wall, the rear wall, the first sidewall and the second sidewall define a main body that includes a chamber configured to store ink.

Abstract: An ink container includes a chamber, an ink supply portion, an electrical interface, and a first key portion. The ink supply portion is configured to supply ink from the chamber. The supply port defines a front end of the ink supply portion. The supply port is oriented in an attachment direction. The electrical interface has a contact surface facing upward in an up-down direction. The contact surface of the electrical interface is positioned above the supply port in the up-down direction. The first key portion is positioned forward of the supply port in the attachment direction, above the supply port in the up-down direction, and below the contact surface of the electrical interface in the up-down direction.

Abstract: An ink container is attachable to an attachment portion. The ink container includes a first member and a second member. The first member includes a chamber configured to store ink and a supply portion having a supply opening that opens forward in a front-rear direction. The second member is positioned forward of the first member.

Abstract: An ink container includes a main body, a lower surface, and a guide wall. The main body includes a chamber configured to store ink. The main body has first and second sidewalls spaced apart from one another to define a first width. The supply port faces frontward in an attachment direction of the ink container and is configured to supply ink from the chamber. The lower surface is positioned above the supply port in an up-down direction, and forward of the supply port in the attachment direction of the ink container.

Abstract: An ink container includes a main body and a supply port. The main body includes a chamber configured to store ink. The supply port faces in a first direction. The main body further includes: a front surface positioned in the first direction from the supply port; a left surface that extends from the front surface in a second direction opposite to the first direction; a right surface that extends from the front surface in the second direction; and a first groove that extends from the front surface in the second direction, the first groove being positioned above the supply port in an up-down direction.

Abstract: An ink container includes a chamber, a supply port, an electrical interface, and a protrusion. The chamber is configured to store ink. The supply port faces frontward in an insertion direction. The electrical interface includes a contact surface that faces upward in an up-down direction orthogonal to the insertion direction. The protrusion is positioned upward in the up-down direction and frontward in the insertion direction of the supply port.

Abstract: A liquid cartridge includes a housing, a first support member, and a first valve mechanism. The housing includes a first tubular portion extending in a first direction. The first support member has a tubular shape and accommodated in the first tubular portion. The first valve mechanism is at least partially accommodated in the first support member.

Abstract: A liquid container is insertable into an attachment unit in a first direction. The liquid container includes a main body that includes a chamber and a protrusion. The chamber is configured to store liquid configured to store liquid. The protrusion has a contact surface that faces a second direction opposite to the first direction.

Abstract: There are provided a reticle, a reticle unit, and an optical apparatus, such as a rifle scope, each having a novel configuration that allows formation of a desired pattern. In a reticle 30A1 on which a pattern that serves as an indicator when an object under observation is visually recognized is formed, the pattern is formed of protruding sections 33a and 33b provided on a pattern formation surface 31a of a plate-shaped optical member 31. The protruding sections 33a and 33b are each formed of a plurality of protruding ridges 133 (structural elements) extending in the lengthwise direction of a line that forms the pattern in parallel to the widthwise direction of the line.

Abstract: There are provided a reticle, a reticle unit, and an optical apparatus, such as a rifle scope, each having a novel configuration that allows formation of a desired pattern. In a reticle 30A1 on which a pattern that serves as an indicator when an object under observation is visually recognized is formed, the pattern is formed of protruding sections 33a and 33b provided on a pattern formation surface 31a of a plate-shaped optical member 31. The protruding sections 33a and 33b are each formed of a plurality of protruding ridges 133 (structural elements) extending in the lengthwise direction of a line that forms the pattern in parallel to the widthwise direction of the line.