Videojet Technologies Inc.

Carl Mann

Matthew Brian Tomlin

Philip John Blowfield

Robert Smith

Michael Stamp

Trevor Lye

Jerzy Marcin Zaba

Ian M Fost

John Bostock

John Bostick

Michael Jeffrey Stamp

A method for measuring the volume of liquid, such as ink or solvent, remaining in a container, such as a replacement cartridge for a continuous ink jet printer, uses a reservoir enclosing an internal space having a variable volume for storage. The reservoir is adapted to provide a reduction in the pressure of the internal space, the reduction substantially monotonically increasing in magnitude as liquid is drawn into the printer, such that the volume of liquid remaining may be calculated from knowledge of the minimum withdrawal pressure required to draw further liquid from the reservoir into the printer. Containers for use with the method have a liquid dispensing port adapted to allow liquid to be dispensed when a withdrawal pressure at the exterior of the port is less than the pressure of the internal space and adapted to prevent the ingress of air into the internal space of the reservoir as liquid is dispensed.

Container and method for liquid storage and dispensing

A fluid cartridge for an inkjet printer includes an inner reservoir containing a printing fluid. The reservoir includes walls enclosing an internal space having a variable volume for storage of the printing fluid and a port for dispensing the printing liquid. The reservoir includes a rigid framework and one or more elastically deformable sections. The cartridge further includes an outlet for connection to the printer, an outer housing in which the reservoir is housed, an electronic storage device configured to store data relating to the contents of the cartridge, and at least one electrical contact associated with the electronic storage device and provided on a substrate. The reservoir provides a reduction in pressure of the internal space whereby the equilibrium pressure difference between the internal space and the surrounding atmosphere increases substantially monotonically in magnitude as liquid is dispensed.

Fluid cartridge for an inkjet printer

An ink system of an ink jet printer includes a fluid tank. The fluid tank includes a generally conically shaped side wall, the side wall sloping inwardly from a top portion to a bottom portion. A bottom surface is disposed adjacent the bottom portion of the side wall. A first fluid conduit is disposed in the fluid tank and includes an opening adjacent to and above the bottom surface of the fluid tank. A second fluid conduit is disposed in the fluid tank and includes an opening at a location above the opening of the first fluid conduit. A pump is in fluid communication with the first fluid conduit and the second fluid conduit. An ink supply line is in fluid communication with the pump. A print head is in fluid communication with the ink supply line.

Ink mixing system

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St. Ives, United Kingdom

Carl Mann