DAVID PAUL PRINCE
Pilots at Post Rd, Wakefield, RI

2007010, May 10, 2007

Feb 2, 2006

11/345727

David Prince - Wakefield RI, US

Speedline Technologies, Inc. - Franklin MA

B23K 1/08, B23K 37/06, B23K 31/00

228039000, 228105000, 228180220

A stencil printer for depositing solder paste onto an electronic substrate includes a frame and a stencil coupled to the frame. A dispenser is coupled to the frame, with the dispenser and the stencil being configured to deposit solder paste onto the plurality of pads of the electronic substrate. An imaging system is configured to capture images of regions of interest of at least one of the electronic substrate and the stencil. The stencil printer further includes a controller coupled to the imaging system, with the controller being configured to control movement of the imaging system to capture images of regions of interest of at least one of the electronic substrate and the stencil extending generally along a first axis before moving the imaging system in another direction. A method for dispensing material on a substrate is further disclosed.

2007010, May 10, 2007

Nov 10, 2005

11/272192

David Prince - Wakefield RI, US

Speedline Technologies, Inc. - Franklin MA

B23K 1/08, B23K 37/06, B23K 31/02

228039000, 228180220

A stencil printer for depositing solder paste onto a plurality of pads of an electronic substrate includes a frame and a stencil coupled to the frame. The stencil has a plurality of apertures formed therein. The stencil printer further includes a support assembly coupled to the frame, the support assembly supporting the electronic substrate in a printing position. An imaging system is adapted to capture images of multiple areas of one of the electronic substrate and the stencil. A controller, coupled to the imaging system, is adapted to control movement of the imaging system to capture an image of an area while maintaining a minimum velocity above zero when capturing the image of the area. Methods for dispensing solder paste on a substrate and for inspecting the substrate are further disclosed.

6738505, May 18, 2004

May 4, 1999

09/304699

David P. Prince - Wakefield RI

Speedline Technologies, Inc. - Franklin MA

G06K 900

382150, 382151, 3562375

The invention relates to a method and apparatus for inspecting a substrate having a substance deposited thereon. The steps of the method include depositing the substance onto the substrate; capturing an image of the substrate; detecting variations in texture in the image to determine a location of the substance on the substrate; and comparing the location of the substance with a desired location. The apparatus includes a screen printer that dispenses a substance at a predetermined location on a substrate, and a machine vision inspection system that includes texture based recognition of the substance.

2005026, Dec 8, 2005

Jun 2, 2004

10/858885

David Prince - Wakefield RI, US

Speedline Technologies, Inc. - Franklin MA

B41L013/18

101123000

An apparatus and methods for depositing material on a surface of an electronic substrate are provided and include a squeegee device or system for distributing material to be deposited on the electronic substrate. The squeegee device or system can include a first wiping blade and a second wiping blade spaced from and parallel to the first wiping blade. The first wiping blade and the second wiping blade are disposed at an angle relative to a vertical axis, the vertical axis being perpendicular to a surface of an electronic substrate, such that when the first and the second wiping blades contact a surface of a stencil to deposit or print the material onto the electronic substrate, the first and the second wiping blades contact the stencil surface at a rake angle relative to a direction in which the squeegee device traverses the stencil surface. The rake angle of the first and the second wiping blades enables the squeegee device to traverse the stencil surface at an angle, which causes the material deposited in front of either wiping blade to flow laterally in one direction toward an end of the wiping blade during a print stroke. In addition, the first wiping blade is offset relative to the second wiping blade such that as the material laterally flows in front of one of the wiping blades and runs off the end of the wiping blade during a print stroke, the other wiping blade is positioned to retrieve the material runoff and to thereby remix or redistribute the material runoff across the stencil surface during a print stroke in an opposite direction.

7072503, Jul 4, 2006

Feb 20, 2004

10/784118

David P. Prince - Wakefield RI, US

Speedline Technologies, Inc. - Franklin MA

G06K 9/00

382150, 382151, 3562375

A method of inspecting a stencil having apertures through which a substance is deposited onto an electronic substrate includes depositing the substance through the stencil and onto the substrate, capturing a first image of the stencil after the deposit of the substance and detecting variations in texture of the substance in the first image, capturing a second image of the electronic substrate having the substance on its surface and detecting variations in texture of the substance in the second image, defining a region of interest in the first image and in the second image to determine whether at least one feature exists in the region of interest, measuring a first span of the at least one feature in the region of interest in the first image and a second span of the at least one feature in the region of interest in the second image, and correlating the first span of the at least one feature and the second span of the at least one feature to determine whether a threshold span of the at least one feature has been reached.

7310438, Dec 18, 2007

Jun 30, 2006

11/479076

David P. Prince - Wakefield RI, US

Speedline Technologies, Inc. - Franklin MA

G06K 9/00

382144, 382143, 382145

A method of inspecting a stencil having apertures through which a substance is deposited onto an electronic substrate includes depositing the substance through the stencil and onto the substrate, capturing a first image of the stencil after the deposit of the substance and detecting variations in texture of the substance in the first image, capturing a second image of the electronic substrate having the substance on its surface and detecting variations in texture of the substance in the second image, defining a region of interest in the first image and in the second image to determine whether at least one feature exists in the region of interest, measuring a first span of the at least one feature in the region of interest in the first image and a second span of the at least one feature in the region of interest in the second image, and correlating the first span of the at least one feature and the second span of the at least one feature to determine whether a threshold span of the at least one feature has been reached.

7710611, May 4, 2010

Feb 16, 2007

11/707757

David P. Prince - Wakefield RI, US

Illinois Tool Works, Inc. - Glenview IL

H04M 1/40

358 329, 382144

A stencil printer apparatus for depositing a solder paste onto the surface of the electronic substrate, comprising a frame, a stencil coupled to the frame, the stencil having a plurality of apertures, a dispenser coupled to the frame, the stencil and the dispenser being configured to deposit the solder paste onto the electronic substrate, an imaging system constructed and arranged to capture an image of the electronic substrate, and a controller coupled to the imaging system and configured to control movement of the imaging system to capture the image. The imaging system comprises a camera element configured to capture the image of at least the portion of the surface of the electronic substrate, and a first illumination element comprising a long-wavelength light source configured to illuminate at least the portion of the surface of the electronic substrate by generating long-wavelength light. Other embodiments and methods are disclosed.

7149344, Dec 12, 2006

Mar 29, 2005

11/091986

David P. Prince - Wakefield RI, US

Speedline Technologies, Inc. - Franklin MA

G06K 9/00

382150, 382151, 3562375

A method of analyzing an image of a substance deposited onto a substrate, the image comprising a plurality of pixels, includes defining a region of interest in the image, associating the region of interest with first and second perpendicular axis, wherein a set of pixels in the image lie along the first axis, converting the pixels in the region of interest to a single dimensional array aligned with the first axis and projecting along the second axis, and applying at least one threshold to the single dimensional array, the threshold based at least in part on a predetermined limit.

6891967, May 10, 2005

Dec 12, 2003

10/734395

David P. Prince - Wakefield RI, US

Speedline Technologies, Inc. - Franklin MA

G06K009/00

382150, 382151, 3562375

A method of analyzing an image of a substance deposited onto a substrate, the image comprising a plurality of pixels, includes defining a region of interest in the image, associating the region of interest with first and second perpendicular axis, wherein a set of pixels in the image lie along the first axis, converting the pixels in the region of interest to a single dimensional array aligned with the first axis and projecting along the second axis, and applying at least one threshold to the single dimensional array, the threshold based at least in part on a predetermined limit.

7404861, Jul 29, 2008

Apr 23, 2004

10/831468

Thomas C. Prentice - Westford MA, US
David P. Prince - Wakefield RI, US

Speedline Technologies, Inc. - Franklin MA

B05C 11/00, B05B 13/02, B05B 3/00

118713, 118665, 118305, 118323

Aspects of the invention are directed to systems and methods for dispensing materials onto a substrate. In one aspect, a dispensing system includes a dispenser having a dispensing outlet positionable over a top surface of the substrate, the dispenser having a substantially vertical dispensing axis along which material from the dispenser is dispensed, and a vision system, coupled to the dispenser, the vision system being positionable to obtain images of the top surface of the substrate along an optical axis, wherein the vision system is constructed and arranged such that the optical axis intersects the dispensing axis.