Patents by Inventor David F. Hall
David F. Hall 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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Publication number: 20140298557Abstract: A protective shroud for a welding helmet. The shroud includes fabric that may be arranged to form an open-ended continuous loop. The loop may be sized to cover at least a portion of a user's neck. The shroud may also include one or more fasteners. Each fastener may be connected to the fabric and removably securable to the welding helmet. In other embodiments, a kit including a protective shroud, and a welding helmet including a protective shroud.Type: ApplicationFiled: April 8, 2014Publication date: October 9, 2014Inventors: Rodman Townsend, JR., Eric B. Moll, Ina M. Graber, Mary Lou Wittmer, Darlene Wittmer, Mark A. Graber, David F. Hall, Darren Graber
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Patent number: 7731167Abstract: Methods and systems employing belt conveyors adapted to feed signatures to a collating conveyor and a control system that regulates the operation of the belt conveyors are provided. The control system is adapted to regulate the speed of the belt conveyors in response to the speed of the collating conveyor, for example, proportional to the speed of the collating conveyor, to minimize or eliminate signature misfeeds. The control system may implement a mathematical algorithm that defines a relationship between the collating conveyor speed and the belt conveyor speeds. The systems and methods may include ancillary feeding devices such as joggers and speeder wheels to optimize the transfer of signatures.Type: GrantFiled: December 1, 2006Date of Patent: June 8, 2010Assignee: Prim Hall Enterprises, Inc.Inventors: John E. Prim, David F. Hall, Berend Doane
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Publication number: 20080128983Abstract: Methods and systems employing belt conveyors adapted to feed signatures to a collating conveyor and a control system that regulates the operation of the belt conveyors are provided. The control system is adapted to regulate the speed of the belt conveyors in response to the speed of the collating conveyor, for example, proportional to the speed of the collating conveyor, to minimize or eliminate signature misfeeds. The control system may implement a mathematical algorithm that defines a relationship between the collating conveyor speed and the belt conveyor speeds. The systems and methods may include ancillary feeding devices such as joggers and speeder wheels to optimize the transfer of signatures.Type: ApplicationFiled: December 1, 2006Publication date: June 5, 2008Applicant: PRIM HALL ENTERPRISES, INC.Inventors: John E. PRIM, David F. HALL, Berend DOANE
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Publication number: 20080099308Abstract: Methods and systems are provided for regulating the operation of a chain driven conveyor to minimize the effect of chain stretch. The system includes a chain conveyor having a chain and a plurality of indexing pins mounted to the chain, a signature feeder, at least one sensor adapted to detect variations in chain length; and a controller adapted to control the speed of rotation of the signature feeder in response to the variations in chain length to minimize variations in the spacing of the signatures and the indexing pins. The signature feeder may include a disk separator and a drum conveyor or a crank-type conveyor, among others. Methods of operating the system are also disclosed.Type: ApplicationFiled: October 31, 2006Publication date: May 1, 2008Applicant: PRIM HALL ENTERPRISES INC.Inventor: David F. Hall
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Patent number: 7014184Abstract: Systems, methods, and devices for preventing the misalignment of sheet material in hoppers adapted to feed sheet material to disk separators are disclosed. In one aspect, a floating backguide is provided. The floating backguide moves independently of the hopper with which the backguide is associated. The floating backguide may be pivotally mounted at a first end and free to deflect to a limited degree at a second end. In one aspect, the deflection of the second end is limited in the horizontal direction by two stationary bars and in the vertical direction by two stops. The vertical deflection of the second end of the backguide may also be limited by a resilient material, for example, a spring or an elastomer. A method for feeding sheet material to a disk separator using a floating backguide is also provided.Type: GrantFiled: April 30, 2003Date of Patent: March 21, 2006Assignee: Prim Hall Enterprises Inc.Inventors: David F. Hall, Thomas Venne
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Publication number: 20040217544Abstract: Systems, methods, and devices for preventing the misalignment of sheet material in hoppers adapted to feed sheet material to disk separators are disclosed. In one aspect, a floating backguide is provided. The floating backguide moves independently of the hopper with which the backguide is associated. The floating backguide may be pivotally mounted at a first end and free to deflect to a limited degree at a second end. In one aspect, the deflection of the second end is limited in the horizontal direction by two stationary bars and in the vertical direction by two stops. The vertical deflection of the second end of the backguide may also be limited by a resilient material, for example, a spring or an elastomer. A method for feeding sheet material to a disk separator using a floating backguide is also provided.Type: ApplicationFiled: April 30, 2003Publication date: November 4, 2004Applicant: PRIM HALL ENTERPRISES INC.Inventors: David F. Hall, Thomas Venne
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Patent number: 6623000Abstract: A feeding and conveying system for feeding and conveying sheet material for printing, collating, or binding the sheet material, among other processes. The feeding and conveying system includes at least one feeder having a magazine containing a plurality of articles of sheet material, for example, signatures, a rotatable disk for separating the sheet material from the magazine, and a feed drum for transferring the sheet material from the magazine to a conveyor. The rotatable disk, having at least one separating blade, is reciprocally rotated to separate the sheet material from the magazine. The separation of the sheet material from the magazine may be aided by applying a source of vacuum to the sheet material, for example, by means of suckers. The feed drum may include one or more grasping devices for grasping and retaining the sheet material, for example, one or more grippers. The rotation of the separator disk may be controlled by a programmable controller.Type: GrantFiled: June 15, 2001Date of Patent: September 23, 2003Assignee: Prim Hall Enterprises Inc.Inventor: David F. Hall
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Publication number: 20030001328Abstract: A feeding and conveying system for feeding and conveying sheet material for printing, collating, or binding the sheet material, among other processes. The feeding and conveying system includes at least one feeder having a magazine containing a plurality of articles of sheet material, for example, signatures, a rotatable disk for separating the sheet material from the magazine, and a feed drum for transferring the sheet material from the magazine to a conveyor. The rotatable disk, having at least one separating blade, is reciprocally rotated to separate the sheet material from the magazine. The separation of the sheet material from the magazine may be aided by applying a source of vacuum to the sheet material, for example, by means of suckers. The feed drum may include one or more grasping devices for grasping and retaining the sheet material, for example, one or more grippers. The rotation of the separator disk may be controlled by a programmable controller.Type: ApplicationFiled: June 15, 2001Publication date: January 2, 2003Inventor: David F. Hall
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Patent number: 6193229Abstract: A signature feeder for delivering stacked signatures to a conveyer or gatherer includes a variable speed separator disk for separating signatures from the stacked signatures. The separator disk mechanically couples with a servomotor. The separator disk has a blade with a leading edge and a trailing edge. The servomotor accelerates the separator disk through the stacked signatures to separate signatures from the stacked signatures. After a signature separates from the stacked signatures, the servomotor slows the separator disk.Type: GrantFiled: April 6, 1999Date of Patent: February 27, 2001Inventors: David F. Hall, Jonh E. Prim
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Patent number: 5138817Abstract: The system comprises at least one conveyor for carrying the bundles with equipment for checking bundle integrity and verifying correct addresses. Equipment can be included to remove unacceptable bundles and to divert each bundle to the predetermined conveyor and align the bundles properly. The bundles are rotated and held in position until a uniformed, and/or predetermined dimension log is achieved and then moved into position for strapping the log, identifying it and attaching the label. Conveyors are used to place each log in position to be palletized in conjunction with other logs. The logs can be rotated to create cross stacking of the logs and equipment can be used to raise or lower each layer of the logs. When the complete pallet is created an address and information label is prepared and attached.Type: GrantFiled: April 1, 1991Date of Patent: August 18, 1992Assignee: Prim Hall Enterprises, Inc.Inventors: Harry E. Mowry, David F. Hall, John E. Prim, Robert D. Kinson
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Patent number: 4941757Abstract: A flexible arcuate one-piece reservoir member has a generally cylindrical outer surface with a flange projecting radially outwardly from that surface. The reservoir is attached to a conventional ball bearing by snapping the flange into a groove in the outer race of the bearing. Passageways extend through the reservoir member so that grease can be forced through the passageways into a cavity defined by the reservoir member and the adjacent portions of the bearing, thereby enabling grease in the bearing to ber replenished periodically.Type: GrantFiled: July 31, 1989Date of Patent: July 17, 1990Assignee: Eastman Kodak CompanyInventor: David F. Hall