The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 1980
Filed:
Jan. 27, 1978
Nelson R Henry, Decatur, GA (US);
The Woodman Company, Inc., Decatur, GA (US);
Abstract
A door mechanism for controlling flow of loose products, such as potato chips, from a scale hopper in a packaging machine comprises a hinged door, a spring biasing the door towards its closed position, an arm attached to the door, a cam follower carried by the arm, and a cam acting in combination with the cam follower to force the door open against the influence of the spring. The cam is mounted independently of the scale hopper and the cam follower is not in contact with the cam while product is being weighed in the scale hopper. When weight has been made, the cam is rotated in response to signals generated by the weighing scale. The profile of the cam is such as to rapidly open and close the door for dumping and provides smooth vibration-free operation. The slope of the cam lobe portion during opening of the door provides an uplifting scale restoring force so that the scale is immediately returned to zero weight in readiness for the next cycle.