Other

Messer Industries Usa, Inc.

Speedring Systems, Inc.

Edward C Smith

Michael N Sweeney

John Quinn Nelson

Emery Erdelyi

James Sinclair Salloum

Wilburn Alden White

Mikael Orsén

David Alden White

Steve F Sagan

A method for cooling a mold used in the production of plastic parts is described. A capillary feeds liquid carbon dioxide to a channel present in the mold typically used in making plastic parts having thin gaps or thin open sections in the plastic part. The channel will be approximately the same size as the inner diameter of the capillary but will increase in size either stepwise or progressively as it passes through the mold, particularly at the location where cooling is desired therefore providing more effective cooling to the mold and slides and lifters present therein.

Method for cooling thin cores in plastic molds

A foldable road marker is formed of a pair of panels each having a central stem portion integrally connected with side panel portions. The panels each having an elongated slot with the stem portion and slots being coaxial. Each stem portion is fitted within the slot of the opposite panel for interconnecting the panels. The panels are pivotable relative to each other into a position in which they are transverse to each other or, alternatively, into a folded position in which they are generally parallel and closely overlap to each other for storage. Guide members are formed in the slots of each of the panels for slideably fitting within vertically arranged guide channels formed in the stem portions of their opposite panel for guiding the assembly of, and the positions of, the panels relative to each other. Detents are provided for holding the panels in their transverse position for marker use or, alternatively, in their folded, parallel storage position. The upper ends of the panels are provided with seats for mounting signaling devices, such as lights and the like. A ring-like, removable base may be provided to encircle the lower end of the transversely arranged panels for stabilizing and supporting the lower ends of the panels upon a road surface.

Foldable road marker

A polygon scanner utilizing a fluid film bearing and method for its use in a flat field imaging device having a relatively large format size, a very high scan rate and high resolution. The polygon scanner has a polygon scan optic connected to a motor, a fluid film bearing, and a windowed enclosure. Repeating cross-scan error components are mapped and actively corrected using a piezoelectric actuator to directly displace the laser element or using a mirror in the optical path that is tilted by means of an electro-optic device to influence a virtual displacement of the optical beam. The repeating components of in-scan errors are similarly, and independently, mapped and corrected by summing with the output of a phase detector in a line scan speed control system. Methods for independently correcting the errors associated with cross-scan and in-scan components in the scan optic are significantly enhanced by the use of a fluid film bearing in general and a self-acting gas bearing in particular, supporting the rotating polygon scan optic. A method for periodic calibration of the cross-scan error map established at the factory may be implemented by a self-calibration sub-routine using a stored sinusoidal voltage waveform. This simplified calibration technique of the invention is enabled by the use of a fluid film bearing in general and a self-acting gas bearing in particular.

Polygon scanner having a fluid film bearing and active correction of

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Sterling Heights, MI, United States of America

Edward C Smith