Abstract: In one example in accordance with the present disclosure, a printing fluid container for a printing system is described. The printing fluid container includes a container body for holding printing fluid, a collar connected to the container body, and a cap removably engaging the collar. The collar has a plurality of collar teeth extending peripherally around the collar. The cap has a plurality of cap teeth extending peripherally around the cap. The cap teeth are configured for interfitment with the collar teeth such that rotation of the cap about the longitudinal axis in a first rotational direction effects cam-actuated removal of the cap from the collar.

Abstract: In one example in accordance with the present disclosure, a printing fluid container for a printing system is described. The printing fluid container includes a container body for holding printing fluid, a collar connected to the container body, and a cap removably engaging the collar. The collar has a plurality of collar teeth extending peripherally around the collar. The cap has a plurality of cap teeth extending peripherally around the cap. The cap teeth are configured for interfitment with the collar teeth such that rotation of the cap about the longitudinal axis in a first rotational direction effects cam-actuated removal of the cap from the collar.

Abstract: One example provides an article. The article includes a container body. The article includes a lid covering the container body, the lid including a lid aperture to permit passage of a printing fluid into the container body. The article includes a lid manifold mounted to the lid. The lid manifold includes a lid manifold input port to be fluidly connected to and disconnected from a container manifold port of a separate printing system. The lid manifold includes a lid manifold output opening that is in the form of a needle having a length of less than or equal to about 6 mm and is fluidly connected to the lid aperture. The lid manifold includes a channel fluidly connecting the lid manifold input port and the lid manifold output opening.

Abstract: One example provides an article. The article includes a container body. The article includes a lid covering the container body, the lid including a lid aperture to permit passage of a printing fluid into the container body. The article includes a lid manifold mounted to the lid. The lid manifold includes a lid manifold input port to be fluidly connected to and disconnected from a container manifold port of a separate printing system. The lid manifold includes a lid manifold output opening that is in the form of a needle having a length of less than or equal to about 6 mm and is fluidly connected to the lid aperture. The lid manifold includes a channel fluidly connecting the lid manifold input port and the lid manifold output opening.

Abstract: A fluid characteristic sensing device has a projection. The fluid characteristic sensing device receives current pulses and directs the received current pulses through the projection. The received and directed current pulses enable determination of a resistance of the projection and a rate of change of temperature.

Abstract: A container assembly may include a regulated tank to contain a fluid, a free tank to replenish the fluid in the regulated tank, a first expandable member between an interior of the regulated tank and ambient atmospheric pressure, a second expandable member between the interior of the regulated tank and an inflation port, a first valve to selectively connect the free tank to the regulated tank based upon a pressure differential between the interior of the regulated tank and an interior of the free tank and a second valve actuatable between an open state permitting an interior of the free tank to be pressurized and a closed state. The second valve is actuatable between the open state and the closed state based upon a position of the first expandable member.

Abstract: Ink supplies are disclosed in examples herein. An example apparatus a housing includes a first chamber and a second chamber, the housing defining a first port to fluidly couple the first chamber to a printer, the housing including a second port to fluidly couple the first chamber and the second chamber to flow fluid from the second chamber to the first chamber. The apparatus also includes a regulator coupled between the first chamber and the second chamber, the regulator to flow gas from the first chamber to the second chamber when a pressure within the first chamber reaches a threshold.

Abstract: In some examples, a container assembly includes a first body to supply a printing composition, the first body comprising a first port, and the container assembly includes a second body to store a reserve printing composition, the second body comprising a second port. An interconnect has a storage position to fluidically isolate the first body from the second body, and a use position to fluidically connect the first body to the second body to allow the reserve printing composition to flow from the second body to the first body to replenish the printing composition in the first body and to allow air in the first body displaced by the reserve printing composition to flow from the first body to the second body. The interconnect in the storage position has a first orientation to fluidically isolate the first port from the second port, and the interconnect in the use position has a second orientation rotated with respect to the first orientation to fluidically connect the first port to the second port.

Abstract: In one example, a container for holding printing fluid includes a chamber to hold a printing fluid and an inelastic, expandable, and contractible bag occupying space in the chamber. The exterior of the bag is exposed to an interior of the chamber and an interior of the bag is sealed against the interior of the chamber and vented to the atmosphere.

Abstract: A fluid seal may comprise an external sealing body, and an internal sealing body disposed within the external sealing body. The internal sealing body may be radially connected to the external sealing body by a webbing. Further, the external sealing body may hermetically seal a fluid path from the exterior of the fluid path, while the internal sealing body may hermetically seal the fluid path from within the interior of the fluid path.

Abstract: Ink supplies are disclosed in examples herein. An example apparatus a housing includes a first chamber and a second chamber, the housing defining a first port to fluidly couple the first chamber to a printer, the housing including a second port to fluidly couple the first chamber and the second chamber to flow fluid from the second chamber to the first chamber. The apparatus also includes a regulator coupled between the first chamber and the second chamber, the regulator to flow gas from the first chamber to the second chamber when a pressure within the first chamber reaches a threshold.

Abstract: In some examples, a container assembly includes a first body to supply a printing composition, the first body comprising a first port, and the container assembly includes a second body to store a reserve printing composition, the second body comprising a second port. An interconnect has a storage position to fluidically isolate the first body from the second body, and a use position to fluidically connect the first body to the second body to allow the reserve printing composition to flow from the second body to the first body to replenish the printing composition in the first body and to allow air in the first body displaced by the reserve printing composition to flow from the first body to the second body. The interconnect in the storage position has a first orientation to fluidically isolate the first port from the second port, and the interconnect in the use position has a second orientation rotated with respect to the first orientation to fluidically connect the first port to the second port.

Abstract: Examples of a container assembly are disclosed herein. An example of the container assembly includes a first body to supply printing composition and a second body to store reserve printing composition. The example of the container assembly additionally includes an interconnect having a storage position to fluidically isolate the first body from the second body and a use position to fluidically connect the first body to the second body to allow the reserve printing composition to flow from the second body to the first body as needed to replenish the printing composition in the first body and to allow air in the first body displaced by the reserve printing composition to flow from the first body to the second body.

Abstract: A container assembly may include a regulated tank to contain a fluid, a free tank to replenish the fluid in the regulated tank, a first expandable member between an interior of the regulated tank and ambient atmospheric pressure, a second expandable member between the interior of the regulated tank and an inflation port, a first valve to selectively connect the free tank to the regulated tank based upon a pressure differential between the interior of the regulated tank and an interior of the free tank and a second valve actuatable between an open state permitting an interior of the free tank to be pressurized and a closed state. The second valve is actuatable between the open state and the closed state based upon a position of the first expandable member.

Abstract: Examples of a container assembly are disclosed herein. An example of the container assembly includes a regulated tank to supply printing composition and a free tank to supply reserve printing composition to the regulated tank. The container assembly also includes a regulator assembly to control flow of the reserve printing composition from the free tank to the regulated tank and an inflation assembly to prime the regulated tank to supply the printing composition. The container assembly additionally includes a labyrinth to fluidically isolate the flow of ambient air into and out of the regulator assembly from the flow of a supply of air into the inflation assembly.

Abstract: In one example, a container for holding printing fluid includes a chamber to hold a printing fluid and an inelastic, expandable, and contractible bag occupying space in the chamber. The exterior of the bag is exposed to an interior of the chamber and an interior of the bag is sealed against the interior of the chamber and vented to the atmosphere.

Abstract: An example apparatus includes a housing including a first chamber and a second chamber, the housing defining a first port to fluidly couple the first chamber to a printer, the housing including a second port to fluidly couple the first chamber and the second chamber; a bladder disposed in the first chamber, the bladder being inflatable to increase a pressure within the first chamber; and a regulator to regulate fluid flow from the second chamber to the first chamber and to deter fluid flow from the first chamber to the second chamber.

Abstract: Examples of a container assembly are disclosed herein. An example of the container assembly includes a first body to supply printing composition and a second body to store reserve printing composition. The example of the container assembly additionally includes an interconnect having a storage position to fluidically isolate the first body from the second body and a use position to fluidically connect the first body to the second body to allow the reserve printing composition to flow from the second body to the first body as needed to replenish the printing composition in the first body and to allow air in the first body displaced by the reserve printing composition to flow from the first body to the second body.

Abstract: Examples of a container assembly are disclosed herein. An example of the container assembly includes a regulated tank to supply printing composition and a free tank to supply reserve printing composition to the regulated tank. The container assembly also includes a regulator assembly to control flow of the reserve printing composition from the free tank to the regulated tank and an inflation assembly to prime the regulated tank to supply the printing composition. The container assembly additionally includes a labyrinth to fluidically isolate the flow of ambient air into and out of the regulator assembly from the flow of a supply of air into the inflation assembly.

Abstract: An example apparatus includes a housing including a first chamber and a second chamber, the housing defining a first port to fluidly couple the first chamber to a printer, the housing including a second port to fluidly couple the first chamber and the second chamber; a bladder disposed in the first chamber, the bladder being inflatable to increase a pressure within the first chamber; and a regulator to regulate fluid flow from the second chamber to the first chamber and to deter fluid flow from the first chamber to the second chamber.