Charles W Harpold

US Patent:

49208780, May 1, 1990

Filed:

May 3, 1988

Appl. No.:

7/189728

Inventors:

Charles W. Harpold - Grand Rapids MI
James Belcher - Grand Rapids MI

Assignee:

Harco Graphic Products Inc. - Grand Rapids MI

International Classification:

B41F 1510
B41F 1526

US Classification:

101115

Abstract:

A printing machine for simultaneously performing multiple printing operations in a continuous manner includes: a number of platens supporting thereon articles to be printed; a plurality of printing heads designed to print a desired pattern onto the article; and an oval track about which the platens are moved. The track includes first and second portions, wherein the first portion is at a higher elevation than the second portion. The first portion is positioned to orient the platen horizontally for ease in mounting the article thereon. The second portion underlies the printing heads and orients the platens in a downward inclination to thereby clear the printing heads as they are moved along the track. A lifting assembly lifts each platen into engagement with a printing head for printing a pattern onto the article.

US Patent:

43817068, May 3, 1983

Filed:

Mar 18, 1981

Appl. No.:

6/245046

Inventors:

Charles W. Harpold - Grand Rapids MI

International Classification:

B05C 1706
B05C 1708

US Classification:

1011271

Abstract:

A screen for printing curved surfaces comprises a frame having a substantially rigid end segments, and resilient, semi-rigid side segments, which are flexed traversed to the plane of the frame into an arcuate configuration for printing. During assembly of the printing screen, the frame side segments are deflected laterally inwardly a predetermined distance, and temporarily retained in the deflected condition by an assembly jig. A panel of screen fabric is mounted taut in a tensing frame, and positioned overlying the screen frame in the assembly jig. The screen fabric is attached to the perimeter of the screen frame, and the assembled printing screen is cut from the remainder of the screen fabric. The printing screen is then removed from the assembly jig, thereby releasing the frame side segments, and applying additional lateral stress to the screen panel. When the assembled printing screen is flexed into the desired arcuate configuration, the lateral stress in the screen help to retain the pattern in its true, undistorted shape.

US Patent:

47506083, Jun 14, 1988

Filed:

Apr 21, 1986

Appl. No.:

6/854148

Inventors:

Charles W. Harpold - Grand Rapids MI

Assignee:

Harco Graphic Products, Inc. - Grand Rapids MI

International Classification:

B65G 3916

US Classification:

198807

Abstract:

The specification discloses a belt tracking system for screen printing conveyor driers or the like which intentionally shifts the conveyor belt to the left or the right between controlled limits. As the belt is shifted one way, a desired limit is sensed and devices are provided for shifting it back the other way.

US Patent:

52751007, Jan 4, 1994

Filed:

Jul 1, 1992

Appl. No.:

7/907398

Inventors:

Charles W. Harpold - Grand Rapids MI
Eugene H. Kemp - Middleville MI

Assignee:

Harco Graphic Products, Inc. - Grand Rapids MI

International Classification:

B41F 3102
B41F 3120

US Classification:

101335

Abstract:

An apparatus for handling printing ink includes a bucket support positioned over a container that allows buckets to be placed up-side-down on the bucket support and rotated to wipe the inside of the bucket substantially clean. A cover for the container is moveable between an open position which allows the bucket to be placed on the bucket support and a closed position wherein the cover and bucket cooperate to form a substantially air tight closure over the container. Paddles urge ink from the container toward a discharge opening such that ink may be dispensed through various dispensing systems.

US Patent:

43512380, Sep 28, 1982

Filed:

Sep 25, 1980

Appl. No.:

6/190503

Inventors:

Charles W. Harpold - Grand Rapids MI

International Classification:

B41C 114

US Classification:

1011284

Abstract:

The specification discloses a method for screen printing comprising providing a sheet of masking sized to cover a porous printing screen, with pressure sensitive adhesive on one side of the masking and a protective cover sheet thereover. The masking is positioned, cover side up on a work surface, and the desired pattern is scribed on the cover sheet with a pointed instrument, so as to form an indentation in the masking which is visible from the front side thereof. The masking is then turned over on the work surface, front side up, and is cut along the indentation. The cover sheet is peeled from the back side of the masking, thereby removing the enclosed, cut areas from the masking to form a mask or stencil corresponding to the desired pattern. The stencil is then pressed onto the lower side of the printing screen to attach the same to the screen.

US Patent:

50204300, Jun 4, 1991

Filed:

May 2, 1989

Appl. No.:

7/346068

Inventors:

Charles W. Harpold - Grand Rapids MI
James Belcher - Grand Rapids MI

Assignee:

Harco Graphic Products, Inc. - Grand Rapids MI

International Classification:

B41F 1526

US Classification:

101126

Abstract:

A silk screen printing machine having a track about which the printing screens and platens are free to be moved relative to one another in the course of a multi-step printing process. An embodiment is disclosed having the printing screens supported by spokes and platens manually rotatable about a circular supporting track without supporting spokes. The platens move on a common horizontal plane below the printing screens which are brought down onto the platens for screen printing.

US Patent:

48096040, Mar 7, 1989

Filed:

Jan 21, 1988

Appl. No.:

7/146736

Inventors:

Charles W. Harpold - Grand Rapids MI

Assignee:

Harco Graphic Products, Inc. - Grand Rapids MI

International Classification:

B41F 1510
B41F 1514

US Classification:

101115

Abstract:

A numbering machine for use in the printing of numbers, wherein the machine includes a base, a carriage reciprocally mounted to the base, a platent pivotally mounted to the carriage for supporting material upon which the number will be printed, and a scale member provided with indicia which cooperates with the carriage for effecting proper positioning thereof. The scale member also provides indicia for indicating to the operator the proper pivotal orientation of the platen for its particular reciprocal positioning.

US Patent:

51707101, Dec 15, 1992

Filed:

Jan 4, 1991

Appl. No.:

7/640475

Inventors:

Charles W. Harpold - Grand Rapids MI
Eugene H. Kemp - Middleville MI

Assignee:

Harco Graphic Products, Inc. - Grand Rapids MI

International Classification:

B41F 3102

US Classification:

101335

Abstract:

An apparatus for handling printing ink includes a bucket support positioned over a container that allows buckets to be placed up-side-down on the bucket support and rotated to wipe the inside of the buckets substantially clean. A cover for the container is moveable between an open position which allows the bucket to be placed on the bucket support and a closed position wherein the cover and bucket cooperate to form a substantially air tight closure over the container. Paddles urge ink from the container toward a discharge opening such that ink may be dispensed through various dispensing systems.