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:
Jan. 08, 1991
Filed:
Feb. 17, 1989
Richard Brussel, Sulzfeld, DE;
Abstract
A cutting device for severing sheet material comprises a pneumatic cylinder defining a cylinder chamber having opposite first and second ends; a piston longitudinally slidably received in the cylinder chamber for executing working strokes between the first and second ends; a cutting blade situated at least partially externally of the cylinder and being secured to the piston for travel with the piston as a unit; a pressurized air vessel; and a first and a second switching valve connected to the respective ends of the cylinder chamber and to the presurized air vessel. Each switching valve has a first position in which pneumatic communication is maintained between the pressurized air vessel and a respective cylinder chamber part and a second position in which the respective cylinder chamber part is vented. The device further has an assembly for recharging the pressurized air vessel with pressurized air to a predetermined pressure solely prior to each working stroke of the piston and for allowing the pressure to diminish in the pressurized air vessel during each working stroke of the piston. There is further provided an arrangement for coordinating operations of the first and second switching valves and the recharging assembly.