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US 4,070,954 AGranted
Duct forming machine
AssigneeGlass Master Corporation
InventorRonald J. Cailey
Life of this patent
Estimating the term…
Abstract
A machine for fastening the flap of a duct board previously cut in a manner to permit it to be folded into duct form; such machine being capable of stapling the flap to the side edge of the board if desired and of applying a sealing tape to the flap and adjacent other edge of the duct board to complete the forming and sealing of a piece of duct board into a duct.
Claims11
A duct closing machine comprising,
- a plurality of rollers arranged in parallelogram form to guide a duct board folded in duct form through the machine,
- said board having a flap of material on one side thereof,
- means rotating at least one of said rollers to move the duct board through the machine,
- a sled guide on the machine bending and holding the flap on one side of the duct board in engagement with the opposite side of the duct board,
- a tape feeding system positioning the end of a supply of tape in line to be contacted by the lead end of the duct and pulled from the supply by the duct moving through the machine, said system including a tape facing take-up system for pulling the facing from the tape before it is applied to the board,
- means for activating the take-up system after the tape has been contacted by the leading end of the duct and de-activating the system after the trailing end of the duct has had tape applied thereto,
- a smoothing iron for applying the tape over the duct flap and adjacent portion of said other side of the duct board as the duct moves through the machine,
- cutter means for severing the tape applied to the duct free from the supply,
- means responsive to movement of the duct for operating said cutter means after the trailing end of the duct has passed the cutter means,
- and wiper means said tape into firm engagement with said duct board as the duct leaves the machine.
7 more elements
A duct closing machine comprising,
- a plurality of rollers arranged to guide a duct board folded in duct form through the machine,
- said board having a flap of material on one side thereof,
- a sled guide on the machine bending and holding the flap on one side of the duct board in engagement with the opposite side of the duct board,
- a tape feeding system positioning the end of a supply of tape in line to be contacted by the lead end of the duct and pulled from the supply by the duct moving through the machine,
- a smoothing means for applying the tape over the duct flap and adjacent portion of said other side of the duct board as the duct moves through the machine,
- cutter means for severing the tape applied to the duct free from the supply,
- means responsive to movement of the duct for operating said cutter means after the trailing end of the duct has passed to the cutting means, and
- wiper means provided by a power driven rotating paddle wheel having a plurality of flexible paddles wiping said tape into firm engagement with said duct board as the duct leaves the machine, said wiper means wiping said tape several times as it passes through the machine.
5 more elements
Dependencies are inferred from the claim text.