System and method for conveying and sorting articles

• US 5,887,699 A
• Filed: 02/12/1998
• Issued: 03/30/1999
• Est. Priority Date: 11/20/1992
• Status: Expired due to Fees

• Current Assignee: R & L Engineering Incorporated
• Original Assignee: John M. Tharpe
• Inventors: Tharpe, John M.
• Primary Examiner(s): Nguyen, Tuan N.
• Application Number:
  US09/022,912
• Time in Patent Office: 411 Days
• Field of Search: 209/540, 209/583, 209/657, 209/916, 209/917, 198/367, 198/367.1, 198/367.2, 198/370.01, 198/370.02, 198/370.07, 198/370.09, 198/370.1, 198/411, 198/442, 198/637
• US Class Current: 198/367
• CPC Class Codes: B07C 3/065 construction of switches therefor
• CPC Class Codes: B65G 47/52 Devices for transferring articles or materials between conveyors i.e. discharging or feeding devices loading or unloading by means not incorporated in, or not operatively associated with, conveyors B65G65/00; transfer of workpieces during metal rolling B21B41/00
• CPC Class Codes: B65G 47/766 Adjustable ploughs or transverse scrapers
• CPC Class Codes: Y10S 209/916 Reciprocating pusher feeding item

Abstract

Articles are conveyed along a primary conveyor in a first direction, and are moved rapidly onto a selected one of a plurality of sorting conveyors closely packed and extending generally lateral to the primary conveyor by rotating the articles so that a portion of each rotated article extends across the side of the primary conveyor to be frictionally engaged on the sorting conveyor for rapid movement away from the primary conveyor.

Claims

1. A method for conveying and sorting plural, generally rectangular articles each of which includes opposing sides extending generally parallel with a first direction, each article further including opposing front and rear faces between the opposing sides with the front face extending toward the first direction and with a corner at the intersection of each face and each side, the method comprising the steps of:

providing a primary conveyor for conveying the articles in the first direction and a plurality of sorting conveyors extending generally laterally to the first direction;

positioning a feed end of each of the sorting conveyors adjacent a first side of the primary conveyor;

selectively extending an arm having a lateral dimension substantially less than the width of the primary conveyor from a second side of the primary conveyor to engage with the extremity of the arm each article only at a rotation corner between the front face and the article side adjacent the second side of the primary conveyor so as to initially rotate each article through substantially more than 45°

about an axis extending generally normal to the primary conveyor adjacent the extremity of the arm before the rotation corner is substantially translated laterally toward one of the sorting conveyors in order that the rear face of the article is presented first to the feed end of a selected one of the sorting conveyors; and

thereafter

conveying each rotated article along the selected sorting conveyor.

2. The method recited in claim 1 further comprising the step of briefly conveying each article further along the primary conveyor after completing the rotation step caused by engagement of the extending arm, so as to complete rotational translation of the rear face, such further brief conveying along the primary conveyor without engagement of the extending arm.