David H Squires

US Patent:

60421010, Mar 28, 2000

Filed:

Jun 3, 1997

Appl. No.:

8/868119

Inventors:

Alan W. Menard - Bolton CT
Timothy P. MacDonald - South Windsor CT
John M. Davies - Willington CT
Mark C. Schwartz - Windsor CT
David P. Squires - Lebanon CT
Bruce L. Davidson - East Hartford CT

Assignee:

Gerber Systems Corporation - South Windsor CT

International Classification:

B65H 500

US Classification:

271 1001

Abstract:

An automated media transport apparatus and method includes a load module for loading media plates from a flat cassette through one end of an internal drum of an imaging module. Sensors detect the presence of interleaved paper sheets from the media plates being loaded, and paper assemblies remove any interleaved paper sheets. An unload module unloads imaged media plates from the other end of the drum, and position the unloaded plates onto a multi-directional conveyor of the unload module. The conveyor is capable of moving the imaged media plate in one of several directions to other devices for further processing of the media plates.

US Patent:

58185089, Oct 6, 1998

Filed:

Oct 6, 1995

Appl. No.:

8/539964

Inventors:

Ronald J. Straayer - South Windsor CT
David P. Squires - Lebanon CT
David D. Williams - Enfield CT
Christopher J. Chestnut - East Windsor CT
Timothy P. MacDonald - South Windsor CT
John E. Markowski - Berlin CT

Assignee:

Gerber Systems Corporation - South Windsor CT

International Classification:

B41J 247

US Classification:

347262

Abstract:

A photoplotting apparatus is provided. The apparatus comprises an internal drum plotter and a media sheet handling apparatus for sequentially delivering a photosensitive media sheet to the photoplotter for exposure from a stack of such sheets. The photoplotter has reduced turbulence within the drum during exposure of the media sheet, and the sheet handling apparatus includes means for separating the sheets in the stack from interleaves disposed between adjacent sheets in the stack.

US Patent:

58285016, Oct 27, 1998

Filed:

Jul 2, 1996

Appl. No.:

8/674439

Inventors:

Alan W. Menard - Bolton CT
David P. Squires - Lebanon CT
Gene D. Welti - Ellington CT
Joseph A. Wheeler - Vernon CT

Assignee:

Barco Gerber Systems - South Windsor CT

International Classification:

G02B 702
G11B 1700

US Classification:

359819

Abstract:

An optical beam expander mechanism includes a plurality of lenses movably secured to a carriage of an imaging system for varying the magnification and adjusting the focus of an optical beam. A scanning means is also secured to the carriage for reflecting the optical beam from or to a media disposed within an exposure chamber. The carriage is slidably mounted to a spar for scanning the media as the carriage moves along the length of the spar. The carriage includes a plurality of independently controlled magnetically preloaded air bearings to provide an air cushion for frictionless movement of the lens along the carriage. The beam expander mechanism further includes an arm member which sequentially engages each lens and maintains the lens in fixed relationship to the spar for positioning the lens on the carriage. To move each lens to its proper position on the carriage, the arm member engages the lens. The corresponding air bearing is actuated to permit movement of the lens while the carriage is commanded to move a predetermined distance for the required magnification and focus of the optical beam.

US Patent:

59124580, Jun 15, 1999

Filed:

Apr 18, 1997

Appl. No.:

8/844250

Inventors:

David P. Squires - Lebanon CT
Ronald G. Goulet - Hebron CT
Alan W. Menard - Bolton CT
David R. Fournier - Hudson MA

Assignee:

Gerber Systems Corporation - South Windsor CT

International Classification:

H01J 314

US Classification:

250234

Abstract:

A multiple beam scanning system for an imaging device, such as a photoplotter and scanner, includes a plurality of scanning assemblies slidably coupled to a spar that extends the length and parallel to the longitudinal axis of a scanning surface of an internal drum. The scanning assemblies simultaneously reflect a plurality of optical beam to or from a plate of media disposed on the scanning surface. A photoplotter includes a plurality of independently controlled optical beam generators that emit an optical beam to a corresponding scanning assembly which then reflects the optical beams to the media. A scanner includes a plurality of optical beam receivers that generate imaging signals indicative of the optical beam reflected from the media by each corresponding scanning assembly. The optical beam generators and receivers may be disposed at one end of the internal drum. This embodiment requires the rearward scanning assembly include an optical periscope for reflecting the optical beam parallel to the longitudinal axis of the internal drum.

US Patent:

58415670, Nov 24, 1998

Filed:

Jul 2, 1996

Appl. No.:

8/674766

Inventors:

David P. Squires - Lebanon CT
Joseph A. Wheeler - Vernon CT

Assignee:

Barco Gerber Systems - South Windsor CT

International Classification:

G02B 2608

US Classification:

359212

Abstract:

An imaging system for imaging a substrate surface at several imaging wavelengths comprises a replaceable beam generating module, a spinning mirror and a controller. The beam generating module generates an imaging beam in dependence on beam command signals. The imaging beam has a wavelength which is a one of the plurality of imaging wavelengths. The beam generating module further presents the imaging beam along a prescribed path, and the beam generating module generates wavelength signals indicative of the imaging beam wavelength. The controller receives the wavelength signals, and generates the beam command signals in dependence on the wavelength signals. The beam command signals control generation of the imaging beam in accordance with a prescribed pattern to image upon the substrate surface.

US Patent:

20170021454, Jan 26, 2017

Filed:

Jun 10, 2016

Appl. No.:

15/179566

Inventors:

- Oxford MA, US
William O'NEILL - Cambridge, GB
David SQUIRES - Lebanon CT, US
Martin SPARKES - Shingay Cum Wendy, GB
Andrew PAYNE - Cambridge, GB

International Classification:

B23K 26/342
B33Y 30/00
B23K 26/073
B23K 26/06
B23K 26/08
B23K 26/082
B33Y 10/00
B33Y 50/02

Abstract:

Systems and methods for multiple beam additive manufacturing use multiple beams of light (e.g., laser light) simultaneously to expose layers of powder material in selected regions until the powder material fuses to form voxels, which form build layers of a three-dimensional structure. The light may be generated from selected light sources and coupled into an array of optical fibers having output ends arranged in an optical head such that the multiple beams are directed by the optical head to different locations on each of the powder layers. The multiple beams may provide distributed exposures forming a distributed exposure pattern including beam spots that are spaced sufficiently to separate the fused regions formed by each exposure. The multiple beams may be moved using various techniques (e.g., by moving the optical head) and according to various scan patterns such that a plurality of multiple beam distributed exposures form each build layer.

US Patent:

20170021455, Jan 26, 2017

Filed:

Jun 10, 2016

Appl. No.:

15/179661

Inventors:

- Oxford MA, US
William O'NEILL - Cambridge, GB
David SQUIRES - Lebanon CT, US
Martin SPARKES - Shingay Cum Wendy, GB
Andrew PAYNE - Trumpington, GB

International Classification:

B23K 26/342
B33Y 30/00
B23K 26/073
B23K 26/06
B23K 26/082
B33Y 10/00
B33Y 50/02

Abstract:

Systems and methods for multiple beam additive manufacturing use multiple beams of light (e.g., laser light) to expose layers of powder material in selected regions until the powder material fuses to form voxels, which form build layers of a three-dimensional structure. The light may be generated from selected light sources and coupled into an array of optical fibers having output ends arranged in an optical head in at least one line such that multiple beams are sequentially directed by the optical head to the same powder region providing multiple beam sequential exposures (e.g., with pre-heating, melting and controlled cool down) to fuse the powder region. The multiple sequential beams may be moved using various techniques (e.g., by moving the optical head) and according to various scan patterns such that a plurality of fused regions form each build layer.