541results about How to "Constant" patented technology

Disclosed herein is a method of operating a polymerization reactor for a polymerization reaction comprising modifying a recycle gas composition to increase the heat capacity of the recycle gas wherein the recycle gas composition is modified by reducing or eliminating the nitrogen concentration in the recycle gas. In an embodiment, the nitrogen concentration is reduced or eliminated by reducing or eliminating one or more nitrogen input sources to the polymerization reactor and replacing the nitrogen with an alternate inert fluid (a gas or liquid that is inert to the catalyst and reactants). The alternate inert fluid has a higher heat capacity and a higher molecular weight than nitrogen. In an embodiment, the nitrogen utilized to convey a catalyst into the polymerization reactor is replaced with an alternate inert fluid. In an embodiment, the alternate inert fluid is ethane, propane, isobutane, or combinations thereof.

A method and apparatus providing network content distribution using a personal server approach is disclosed. A receiving client is provided with a personal server that can select, aggregate, and organize one or more channels of content in a virtual display space of the client. Selection, aggregation, and organization information is stored only locally. Raw data representing content is stored at a logically separate server across a network. Periodically the personal server requests updated content from the server and stores the content in a local channel database. The personal server synthesizes or generates one or more electronic documents containing the content, based on user-defined virtual space specifications and page organization information. The personal server then presents the electronic documents to a browser or other client element. Unlike past approaches that involve distributing fully formatted content to clients, the personal server can receive raw data, replace tokens in the raw data with other content, obtain embedded channel data, and render pages locally, using a conventional browser, without requiring use of a proprietary viewer, and without sending channel selections and other personal information across the network to an untrusted server.

This invention provides a liquid container capable of stably supplying a liquid contained therein, a liquid using device, a printing apparatus, and a method of manufacturing the liquid container. In one preferred embodiment of this invention, a one-way valve used in an ink tank is constructed of a flexible sheet. In an area of the flexible sheet, an undulated portion is formed whose undulated form is maintained in an operation range of the one-way valve.

A power supply regulation circuit is provided which can achieve a preferable constant current drooping characteristic without the need for a constant current control circuit on the secondary side. During a constant current operation, a switching element (1) is turned on so as to keep constant the on duty of secondary current passing through a secondary winding (110B) of a transformer (110), so that a constant current drooping characteristic is achieved. Further, at this moment, a current limit dictating the maximum value of drain current (ID) passing through the switching element (1) is changed between first and second levels during the on time of the switching element such that the drain current (ID) has a constant peak value.

In various embodiments, systems for providing a constant electrical output from a compressed gas energy storage and recovery system include a hydraulic-pneumatic energy storage and recovery system configured to provide a varying pressure profile at least at one outlet, a hydraulic motor-pump in fluid communication with the outlet, and a control system for enabling the constant electrical output by controlling at least one of pressure, piston position, power, flow rate, torque, RPM, current, voltage, frequency, or displacement per revolution.

A suction device that is used with a power drilling tool for aspirating material removable during operation of the drilling tool, and which includes a suction head (20) displaceable relative to the drilling tool (2) in a direction opposite a drilling direction (B) of the drilling tool (2), and an aeration device (22) fixedly connected by a suction conduit with the suction head (20) for joint displacement therewith.

A tissue sheet having a deep discontinuous pocket structure provides improved durability as measured by the ratio of the cross-machine direction tensile energy absorbed to the cross-machine direction tensile strength.

An object of the invention is to provide an organic electroluminescent device emitting a light at an emission chromaticity properly adjusted while the luminescence brightness is kept constant. The organic electroluminescent device according to the invention, has an organic electroluminescence element having electrodes and an organic electroluminescent layer emitting white light at a chromaticity corresponding to the drive current density formed between the electrodes, and a drive unit driving the organic electroluminescence element while supplying current and controlling the drive current and the current-applying period per unit time in response to chromaticity adjustment input. And, the drive unit controls the drive current to be a first current and the current-applying period to be a first period respectively in response to a first chromaticity adjustment input, and controls the drive current to be a second current larger than the first current and the current-applying period to be a second period shorter than the first period respectively in response to a second chromaticity adjustment input, and adjusts the emission chromaticity of the light emitted while the luminescence brightness of the organic electroluminescence element is kept almost constant. In this way, in response to the chromaticity adjustment input for adjusting emission chromaticity, it is possible to adjust the emission chromaticity corresponding to the chromaticity adjustment input by controlling the drive current to the organic light-emitting element while keeping the luminescence brightness almost constant by adjusting the current-applying period per unit time according to the control of the drive current, thereby the light emission is adjusted to a desired emission chromaticity without change in luminescence brightness.