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:
Jun. 30, 1992
Filed:
Sep. 28, 1990
Robert E Wooley, Charlotte, NC (US);
A Derrell Hightower, Stone Mountain, GA (US);
National Service Industries, Inc., Atlanta, GA (US);
Abstract
A bonded unitized envelope stack, manufacturing apparatus, and manufacturing method are provided in which envelopes in a stack are inter-connected by application of two spots of adhesive on the front panel of each envelope to engage the lower panel of the next above envelope. In one embodiment of the present invention, a conventional folding machine including a seal folder flap trap is modified to enable the application of the two spots of adhesive on the front panel of each envelope, and to produce bonded envelope stacks having a given fixed quantity of envelopes. When an envelope enters the seal folder flap trap, a photocell detects and triggers one counter of a dual counter system. A first counter increments each time an envelope enters the trap, until a count termed 'preset 1' is reached. When 'preset 1' is reached by the first counter, the glue applicator is deactivated. A second counter is then incremented. When a second present count termed 'preset 2' is reached by the second counter, the second counter is reset and the apparatus is deactivated. When an envelope enters the seal folder flap trap, the envelope stops and reverses direction, and two spots of adhesive from two glue applicator heads are applied to the front of the envelope near the bottom fold through two slots cut through the seal flap trap plate.