Patents by Inventor Bedrich Hajek
Bedrich Hajek 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: 5275849Abstract: The apparatus, system and method utilize sequential sprays of wet, low-temperature steam, and dry, high-temperature steam to clean the exterior of laminated objects as well as to effect volatilization of liquid contaminates trapped between lamina thereof. Water is injected into the conduit through which the low-temperature steam is delivered, so as to produce a desirable concentration of droplets therein. A conveyor moves the laminated objects along a horizontal path through zones in which they are sprayed by the low temperature and high temperature steam, and then through a zone in which they are electrostatically coated with powder.Type: GrantFiled: April 21, 1992Date of Patent: January 4, 1994Assignee: Electrostatic Technology, Inc.Inventors: Daniel Castelli, John Donahue, Donald J. Gillette, Bedrich Hajek
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Patent number: 5242718Abstract: An apparatus and method for coating surfaces of workpieces employs an electrostatic fluidized bed unit for producing a cloud of charged particles, for deposition upon the workpiece, and a second fluidized bed for agitating the particulate material and for facilitating feeding thereof to the electrostatic coating bed, the second bed being disposed beneath the first bed, and being in powder flow communication with it.Type: GrantFiled: August 20, 1991Date of Patent: September 7, 1993Assignee: Electrostatic Technology, Inc.Inventors: Donald J. Gillette, Bedrich Hajek
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Electrostatic fluidized bed having horizontal and vertical coating effects and method utilizing same
Patent number: 5213847Abstract: Electrostatic fluidized bed coating apparatus consists of an horizontal porous plate and a contiguous, vertical porous plate. Charged particles exiting the bed formed on the horizontal plate fall past the outer surface of the vertical plate, and are electrostatically recharged by ionized air issuing through it, thereby effectively extending the operative vertical length of the bed and substantially increasing coating efficiency.Type: GrantFiled: June 10, 1991Date of Patent: May 25, 1993Assignee: Electrostatic Technology, Inc.Inventor: Bedrich Hajek -
Patent number: 5116636Abstract: The method utilizies steam to clean the exterior of laminated objects, preliminary to electrostatic powder coating, as well as to effect volatilization of liquid contaminates trapped between lamina thereof. Off-gassing that would otherwise occur when the objects are heated to effect fusion of the powder deposit is thereby avoided.Type: GrantFiled: August 9, 1991Date of Patent: May 26, 1992Assignee: S.L. Electrostatic Technology, Inc.Inventors: Bedrich Hajek, Donald J. Gillette
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Patent number: 5092267Abstract: Apparatus for collecting and drying powder used for electrostatic coating of a workpiece has air injection means incorporated into the collection bin both to dry and also to homogenize powder recovered, just prior to withdrawal from the bin.Type: GrantFiled: June 15, 1990Date of Patent: March 3, 1992Assignee: S. L. Electrostatic Technology, Inc.Inventor: Bedrich Hajek
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Patent number: 5052332Abstract: The apparatus and system utilize sprays of steam to clean the exterior or laminated objects, preliminary to electrostatic powder coating, as well as to effect volatilization of liquid contaminates trapped between lamina thereof. Off-gassing that would otherwise occur when the objects are heated to effect fusion of the powder deposit is thereby avoided. The apparatus includes a conveyor for transporting a workpiece along a horizontal travel path through a chamber, above and below which path a spray compartment and collecting compartment are defined, respectively.Type: GrantFiled: March 15, 1990Date of Patent: October 1, 1991Assignee: S. L. Electrostatic Technology, Inc.Inventors: Bedrich Hajek, Donald J. Gillette
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Patent number: 5041301Abstract: Apparatus and method for coating interior surfaces of objects employs an electrostatic fluidized bed unit in which the fluidization chamber is relatively shallow, and is circumscribed by a marginal portion that conforms closely to the dimensions and configuration of the cavity of the object. The apparatus employs, as a feature of its recovery and recirculation system, a fluidized bed for agitating and facilitating feeding of the particulate material, thus making the system especially well suited for depositing coatings of abrasive materials, such as vitreous frit.Type: GrantFiled: February 7, 1990Date of Patent: August 20, 1991Assignee: S. L. Electrostatic Technology, Inc.Inventors: Donald J. Gillette, Bedrich Hajek
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Patent number: 4950497Abstract: Electrostatic apparatus and method for coating interior surfaces of objects. The apparatus employs a fluidized bed unit in which the fluidization chamber is relatively shallow, and is circumscribed by a marginal portion that conforms closely to the dimensions and configurations of the cavity of the object. The apparatus employs a non-vacuumized powder recovery and recirculation system, and provides a peripheral slot in the marginal portion of the housing for entry of undeposited powder. Coating inside corners of objects is effectively achieved using the method of the invention, and heavy, uniform builds of the particulate material are produced efficiently and at high rates.Type: GrantFiled: June 15, 1989Date of Patent: August 21, 1990Assignee: S.L. Electrostatic Technology, Inc.Inventors: Donald J. Gillette, Bedrich Hajek
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Patent number: 4808432Abstract: An electrostatic powder coating unit utilizes a tubular cloud of charged particles moving helically within a generally cylindrical porous member, for coating workpieces conveyed therethrough. The electrode assembly, by which ionized air is produced for charging the particles, may be mounted to rotate about the cylindrical porous member, for optimal efficiency and effectiveness.Type: GrantFiled: August 18, 1986Date of Patent: February 28, 1989Assignee: Electrostatic Technology IncorporatedInventor: Bedrich Hajek
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Patent number: 4606928Abstract: An electrostatic fluidized bed coating method, apparatus and system utilize a vortex effect within the particle cloud to produce coatings of exceptional uniformity upon a workpiece. The vortex effect produces a secondary particle cloud and a secondary electrostatic field, which contribute to the uniformity of the deposit, and the amount of metal structure included in the unit may be minimized, also to enhance uniformity. Operation can be carried out at voltages that are significantly reduced from those required for similar systems known in the art.Type: GrantFiled: March 7, 1985Date of Patent: August 19, 1986Assignee: Electrostatic Technology IncorporatedInventors: William J. Dunford, Bedrich Hajek
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Patent number: 4517219Abstract: Apparatus for coating wire and the like includes a build control bar that projects horizontally, into the cloud chamber of an electrostatic fluidized bed coating unit, from a supporting carriage. The carriage permits facile movement of the control bar to vary its extension into the coating chamber, and means is provided thereon for changing the angular orientation of the bar by rotating it about its axis, to thereby dispose in working position any of a plurality of longitudinally extending different surface portions. The latter vary from one another in width dimensions and/or configuration, and thereby providing a masking member that can readily be adapted to correspond to the width and/or configuration of a workpiece.Type: GrantFiled: October 20, 1983Date of Patent: May 14, 1985Assignee: Electrostatic Equipment Corp.Inventor: Bedrich Hajek
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Patent number: 4472452Abstract: Build control means is provided by which the characteristics of a cloud of electrostatically charged particles can readily be altered, so as to produce an optimal deposit upon any of a variety of workpieces. The means described offers a high degree of flexibility of application for the apparatus in which it is employed, and is particularly adapted for use in coating electrical conductors of rectangular cross section.Type: GrantFiled: July 30, 1982Date of Patent: September 18, 1984Assignee: Electrostatic Equipment Corp.Inventors: Donald J. Gillette, Bedrich Hajek
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Patent number: 4418642Abstract: Build control means is provided by which the characteristics of a cloud of electrostatically charged particles can readily be altered, so as to produce an optimal deposit upon any of a variety of workpieces. The means described offers a high degree of flexibility of application for the apparatus in which it is employed, and is particularly adapted for use in coating electrical conductors of rectangular cross section.Type: GrantFiled: November 20, 1981Date of Patent: December 6, 1983Assignee: Electrostatic Equipment CorporationInventors: Donald J. Gillette, Bedrich Hajek
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Patent number: 4325982Abstract: Zipper chain is continuously electrostatically coated with powder to produce good coverage of the teeth, even upon its more obscured surfaces. The web is substantially uncoated, and is protected against deleterious heat effects.Type: GrantFiled: April 23, 1980Date of Patent: April 20, 1982Assignee: Electrostatic Equipment CorporationInventors: Donald J. Gillette, Bedrich Hajek, David Seales
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Patent number: RE35879Abstract: The apparatus, system and method utilize sequential sprays of wet, low-temperature steam, and dry, high-temperature steam to clean the exterior of laminated objects as well as to effect volatilization of liquid contaminates trapped between lamina thereof. Water is injected into the conduit through which the low-temperature steam is delivered, so as to produce a desirable concentration of droplets therein. A conveyor moves the laminated objects along a horizontal path through zones in which they are sprayed by the low temperature and high temperature steam, and then through a zone in which they are electrostatically coated with powder.Type: GrantFiled: December 21, 1995Date of Patent: August 25, 1998Assignee: Electrostatic Technology, Inc.Inventors: Daniel Castelli, John Donahue, Donald J. Gillette, Bedrich Hajek