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. 05, 1979
Filed:
Nov. 10, 1976
Thomas E Baird, Springfield, IL (US);
Other;
Abstract
A device for forming demonstration cleaning-test bags and for attaching them to vacuum cleaners comprises basically a cylindrical tube adapted for placement over the air-discharge port of a sweeper, and a co-operating plunger for pushing the central area of a flexible filter cloth or sheet into the tube. The end of the plunger has fixed thereto a hook-type VELCRO disc for engagement with a co-operating loop-type VELCRO disc cemented or stitched centrally of the filter sheet. Thus the inserted sheet can be turned inside-out to form a bag but after the sheet margin has been anchored to the outer lip surface of the cylindrical tube by a contracting coil-spring band which is rolled thereover from an annular plunger seat encircling said lip. For adjustment to different sizes of bag-forming sheets, the band-holding plunger-seat can be slidable along the plunger, or the plunger body can be length-adjustably formed from telescoping sections. The plunger handle can be of truncated conical shape to hold a plurality of contractable bands. The plunger body is desirably hollow to hold a quantity of sand, salt, etc., for sprinkling onto a rug as a part of the cleaning demonstration. The cylindrical tube alternately can be attached over the air-intake port (after nozzle removal) to demonstrate sweeper suction strength.