Patents by Inventor Paul Graham Barrett
Paul Graham Barrett has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9567173Abstract: A sheet feeder comprises a feed deck for supporting a stack of sheets (65) to be fed. The feed deck may be formed by a bed of freely spinning rollers. A feed block (62) comprises a friction pad (66) that projects from the bottom of the feed block (62) towards a drive belt (42) to define a gate therebetween. The drive belt (42) frictionally engages the underside of a bottom sheet of the stack (65) and urges the sheet towards the gate. The feed block (62) comprises a front face (72) immediately upstream from the gate, which is inclined at a sharp angle to the feed direction. The friction pad (66) comprises a lower face that is substantially parallel to the feed direction and does not intersect the plane of the feed block front face (72).Type: GrantFiled: November 16, 2011Date of Patent: February 14, 2017Assignee: CreaseStream LLPInventors: Graham Michael Harris, Paul Graham Barrett
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Publication number: 20150321865Abstract: A sheet feeder comprises a feed deck for supporting a stack of sheets (65) to be fed. The feed deck may be formed by a bed of freely spinning rollers. A feed block (62) comprises a friction pad (66) that projects from the bottom of the feed block (62) towards a drive belt (42) to define a gate therebetween. The drive belt (42) frictionally engages the underside of a bottom sheet of the stack (65) and urges the sheet towards the gate. The feed block (62) comprises a front face (72) immediately upstream from the gate, which is inclined at a sharp angle to the feed direction. The friction pad (66) comprises a lower face that is substantially parallel to the feed direction and does not intersect the plane of the feed block front face (72).Type: ApplicationFiled: November 16, 2011Publication date: November 12, 2015Applicant: CreaseStream LLPInventors: Graham Michael Harris, Paul Graham Barrett
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Publication number: 20150035223Abstract: A sheet feeder comprises a feed deck for supporting a stack of sheets (65) to be fed. The feed deck may be formed by a bed of freely spinning rollers. A feed block (62) comprises a friction pad (66) that projects from the bottom of the feed block (62) towards a drive belt (42) to define a gate therebetween. The drive belt (42) frictionally engages the underside of a bottom sheet of the stack (65) and urges the sheet towards the gate. The feed block (62) comprises a front face (72) immediately upstream from the gate, which is inclined at a sharp angle to the feed direction. The friction pad (66) comprises a lower face that is substantially parallel to the feed direction and does not intersect the plane of the feed block front face (72).Type: ApplicationFiled: November 16, 2011Publication date: February 5, 2015Applicant: CreaseStream LLPInventors: Graham Michael Harris, Paul Graham Barrett
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Patent number: 7775960Abstract: A drum for a creasing device, a resilient creasing ring and method are provided. The drum includes first and second drum parts that cooperate with one another to define a circumferential channel of the drum a base and two side wall for receiving a resilient creasing ring. At least one of the side walls includes recess for receiving a portion of the resilient creasing ring such that the resilient creasing ring cannot be removed radially from the channel. The creasing ring may be continuous or a split ring. A method of mounting the creasing ring includes mounting the resilient creasing ring on a first drum part and axially sliding a second drum part into cooperation with the first drum part to mount the creasing ring within a channel formed therebetween.Type: GrantFiled: October 14, 2009Date of Patent: August 17, 2010Assignee: Tech-ni-Fold LtdInventors: Graham Harris, Paul Graham Barrett
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Patent number: 7686754Abstract: A drum for a creasing device, a resilient creasing ring and method are provided. The drum includes first and second drum parts that cooperate with one another to define a circumferential channel of the drum a base and two side wall for receiving a resilient creasing ring. At least one of the side walls includes recess for receiving a portion of the resilient creasing ring such that the resilient creasing ring cannot be removed radially from the channel. The creasing ring may be continuous or a split ring. A method of mounting the creasing ring includes mounting the resilient creasing ring on a first drum part and axially sliding a second drum part into cooperation with the first drum part to mount the creasing ring within a channel formed therebetween.Type: GrantFiled: May 24, 2007Date of Patent: March 30, 2010Assignee: Tech-ni-Fold LtdInventors: Graham Harris, Paul Graham Barrett
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Publication number: 20100035741Abstract: A drum for a creasing device, a resilient creasing ring and method are provided. The drum includes first and second drum parts that cooperate with one another to define a circumferential channel of the drum a base and two side wall for receiving a resilient creasing ring. At least one of the side walls includes recess for receiving a portion of the resilient creasing ring such that the resilient creasing ring cannot be removed radially from the channel. The creasing ring may be continuous or a split ring. A method of mounting the creasing ring includes mounting the resilient creasing ring on a first drum part and axially sliding a second drum part into cooperation with the first drum part to mount the creasing ring within a channel formed therebetween.Type: ApplicationFiled: October 14, 2009Publication date: February 11, 2010Applicant: Tech-ni-Fold, Ltd.Inventors: Graham Harris, Paul Graham Barrett
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Patent number: 7563220Abstract: A drum for a creasing device, a resilient creasing ring and method are provided. The drum includes first and second drum parts that cooperate with one another to define a circumferential channel of the drum a base and two side wall for receiving a resilient creasing ring. At least one of the side walls includes recess for receiving a portion of the resilient creasing ring such that the resilient creasing ring cannot be removed radially from the channel. The creasing ring may be continuous or a split ring.Type: GrantFiled: December 12, 2007Date of Patent: July 21, 2009Assignee: Tech-ni-Fold Ltd.Inventors: Graham Harris, Paul Graham Barrett