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:
Apr. 08, 1986
Filed:
Jan. 18, 1985
Gerald D Warden, Easton, PA (US);
Kenneth A Hams, Easton, PA (US);
Bell & Howell Company, Allentown, PA (US);
Abstract
Sheets are fed from the top of a stack (12) by a continuously rotating vacuum wheel (40). After the leading edge of a just-fed sheet is detected, a control circuit (110) de-energizes valve means (92) whereby the wheel (40) is effectively disconnected from a source of vacuum (90). Indicia borne on the just-fed sheet is read using a probe (23). If the indicia indicates that the just-fed sheet is related for grouping purposes to previously-fed sheets, the control circuit (110) energizes valve means (92) whereby vacuum is applied to the wheel (40) for the feeding of a further sheet. If the indicia indicates that the just-fed, just-read sheet is not related to previously-fed sheets, the control circuit (110) does not energize the valve means (92) for the feeding of a further sheet until the control circuit (110) receives an indication that all previously-fed sheets have been grouped and discharged onto an insert track (32). The valve means (92) comprises two electrically-actuated solenoid valves (94, 96) connected in parallel between the source of vacuum (90) and a vacuum transfer block (42).