Eastman-kodak Company

Xerox Corporation

Ana Tech Corporation

American Coldset Corporation

Fujifilm Dimatrix, Inc.

Charles W Spehrley

Paul A Hoisington

Thomas Acquaviva

Christopher Stephen Garcia

Donald Calvin Buch

Charles E Smith

Thomas S Albrecht

Donald Steven Hensel

Robert J Scranton

Curtis A Lipkie

Gary Edwin Nichols

Dean H Cranston

D Steven Kepner

Jeffrey R Ulreich

Brian F Walsh

James E Britt

Charles M Thompson

Charles T Thompson

Gary W Schneider

Robert G Palifka

A high resolution ink jet printer includes a rotating drum and a pair of ink jet heads scanned along a substrate carried by the drum in a direction parallel to the axis of the drum. The heads are driven by a lead screw coupled to the drum drive shaft and a control unit controls the rate of drop ejection from the printheads at a rate corresponding to the rate of encoder signals received from an encoder coupled to the drum drive draft. One printhead receives and ejects drops of black, magenta, cyan and yellow high-density inks and the other printhead ejects drops of black, magenta and cyan low-density inks along with another ink which may be a different color or black ink of a different density. High resolution and high print quality are assured by accurate control of the distance between the drum support shaft and the drum surface and also between the drum support shaft and a carriage support rail on which the printhead is supported as it moves adjacent to the drum surface. For hot melt ink, a heater is provided adjacent to the drum surface to maintain the drum surface temperature at a constant level below the melting point of the ink and a housing surrounding the printer has a controlled temperature zone to maintain the ambient temperature about 10&#xb0; C. below the drum temperature.

High resolution multicolor ink jet printer

Apparatus for precisely positioning one or more of the work stations of a document printer/copier relative to an internal drum, including a first member, attached to either a work station or the internal drum, having two sections, each section having a reference surface forming an angle therebetween, an actuator for changing the included angle between the first reference surface and second reference surface, thus enabling the included angle to be increased or decreased, and a second member having a reference surface that mates with the pair of reference surfaces, associated with the other of the work station or the internal drum, so as to accurately adjust the work station relative to the internal drum dependent upon the included angle of the first reference surface and second reference surface.

Apparatus for precisely adjusting the position of work stations in a document printer/copier

Providing plural precollated sets of copies by plurally recirculating a set of documents and normally making two consecutive identical copies per document per circulation, at one-half the copying rate of the copier, feeding these pairs of identical copy sheets separately into two of only 3 (or 4) movable compiler bins, sequentially accumulating and stacking these copy sheets into completed, compiled, collated copy sheet sets in each of the two compiler bins, and then removing the sets one at a time for finishing, from the opposite side of the bins, and sequentially changing, for subsequent circulations of the sets of documents, which 2 of the 3 compiler bins are being fed pairs of copy sheets, and which compiler bin is not, so that a compiled set of copy sheets may be removed from its bin or left in awaiting finishing of a prior set without having any copy sheets fed into that bin, in coordination with and without interfering with said feeding and directing of other copy sheets into other compiler bins. Preferably two copy sheets are fed into the same compiler bin in directly immediate sequence (the second copy of one document and the first copy of the next document) to reduce the number of operations of the bin gates. When there are an odd number of documents, preferably three identical copies are made of each document in a final copying circulation of the document set and fed into all 3 bins, unless the copies are duplex and there are too many documents for plural duplex buffer sets.

Copying system for on-line finishing

The invention provides a scanner system which in one embodiment includes only a single moving part in the document path, namley a drive roll, which serves not only to move the document through the system, but also to provide a backing against which the document is pushed while a proximate region thereof is being scanned. The invention in an embodiment also provides an opto-mechanical assembly that is shock-mounted to the frame of the system at only three-spaced apart locations, so that the assembly tends to be isolated from vibration and torsional forces.

Document scanning system

A document printer includes sheet-feeding apparatus for sequentially presenting both faces of a print-receiving sheet to a print station. According to a preferred embodiment, such apparatus features, as part of the duplex sheet path, reversible sheet-feeding means operable in first or second active modes for selectively feeding sheets into and out of a chute, located upstream from the feeding means, to reverse the sheet's lead edge/trail edge orientation. Such sheet-feeding means is also operable in a passive mode in which it allows sheets to advance, without substantial interference, downstream therepast to a registration position. Control means are provided for switching the feeding means from one of its active modes to its passive mode after a sheet has been advanced into the reversing chute to the extent that the sheet buckles, whereupon the restoring force in the sheet propels the leading edge of the sheet past the feed means and into engagement with a registration gate located at the registration position.

Sheet-registration and feeding apparatus

Core barrel apparatus and a method for obtaining and retrieving sealed core samples of subterranean formations are disclosed. The core barrel apparatus comprises inner and outer core barrels. The upper portion of the outer core barrel is adapted to be connected to a drill string. A core bit for cutting a core sample is mounted on the lower portion of the outer core barrels. The inner core barrel comprises a sample chamber for receiving a core sample as it is formed at the bottom of a bore hole and an expansion chamber for receiving sample fluids. The sample chamber and expansion chamber are selectively connected to one another. The expansion chamber is sealed closed while the sample is being cut and received within the sample chamber. The lower portion of the sample chamber adjacent the core bit is sealed by a flap-valve which includes a flexible flap member. The flexible flap member is deflected from its normal form of a flat disc into a semi-cylindrical form and stored adjacent to the inner circumference of the sample chamber while the sample is being cut. Once the core sample is within the sample chamber, the flap member is permitted to spring into its flat disc form and extend across the opening in the lower portion of the sample chamber in order to seal the core sample within the chamber. Thereafter the expansion chamber is opened to the sample chamber. As the apparatus is raised toward the surface and the pressure within the bore hole decreases, the expansion chamber expands in response to the pressure of the fluid within it and thereby maintains the pressure within the expansion chamber at or relatively near the bore hole pressure.

Method and core barrel apparatus for obtaining and retrieving

Growing community of inventors

White River Junction, VT, United States of America

Charles W Spehrley