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US 3,982,472 AGranted
Envelope machine with window patch removal mechanism
AssigneeNew England Envelope Manufacturing Co.
InventorGeorge F. Howatt
Life of this patent
Estimating the term…
Abstract
Envelope machine of the window-applicator type and means for avoiding application of gum to window when envelope blank is missing and to dispose of the window under similar circumstances.
Claims1
An envelope machine, comprising:
- a. an elongated frame,
- b. a conveyor mounted in the frame for carrying longitudinally of the frame envelope blanks having window openings,
- c. a window applicator mounted on the frame above the conveyor and spaced upstream a substantial distance from the discharge end of the conveyor, the window applicator dropping a window patch toward the conveyor irrespective of whether an envelope blank is present or not,
- d. a roller forming a part of the conveyor at the discharge end and having suction passages, and
- e. means operative when an envelope blank is missing to apply suction to the roller to carry a window patch around the roller to the underside of the conveyor.
2 more elements
Dependencies are inferred from the claim text.