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US 6,296,703 B1Granted
Pneumatic actuator, especially for controlling a basis weight profile of a web actuator
AssigneeJagenberg Papiertechnik GmbH
InventorIngo Becker
Life of this patent
Estimating the term…
Abstract
A pneumatic actuator for control of the coating thickness or basis weight of a coating apparatus for paper or cardboard webs has a pair of spring metal plates which can be deflected outwardly by a pneumatically extendable cushion between these plates in a frame. One end of the pair of plates is anchored while the other end is attached to a coating pin which works against a compression spring counteracting the outward deflection of the metal plates.
Claims8
A pneumatically operated actuator comprising:
- a frame;
- a pair of generally parallel, mutually spaced apart sheet-metal spring plates in said frame and secured to said frame at one side of said plates;
- a pin longitudinally shiftable in said frame and secured to an opposite side of said pair of plates;
- a pneumatic cushion formed between said plates and connectable to a source of compressed air whereby pressurization of said cushion deflects said plates transversely, thereby longitudinally shifting said pin;
- and
- a spring on said frame yieldably counteracting transverse deflection of said plates.
3 more elements
An apparatus for coating a web comprising:
- a plurality of coating control elements disposed across a path of a web to be coated and respectively positionable to vary a basis weight of a coating applied to said web;
- and
- a respective pneumatically operated actuator for each of said elements, each of said actuators comprising:
- a frame,
- a pair of generally parallel, mutually spaced apart sheet-metal spring plates in said frame and secured to said frame at one side of said plates,
- a pin longitudinally shiftable in said frame and secured to an opposite side of said pair of plates,
- a pneumatic cushion formed between said plates and connectable to a source of compressed air whereby pressurization of said cushion deflects said plates transversely, thereby longitudinally shifting said pin, and
- a spring on said frame yieldably counteracting transverse deflection of said plates.
5 more elements
A pneumatically operated actuator comprising:
- a frame;
- a pair of generally parallel, mutually spaced apart sheet-metal spring plates in said frame and secured to said frame at one side of said plates;
- a pin longitudinally shiftable in said frame and secured to an opposite side of said pair of plates;
- a pneumatic cushion formed between said plates and connectable to a source of compressed air whereby pressurization of said cushion deflects said plates transversely, thereby longitudinally shifting said pin;
- a spring on said frame yieldably counteracting transverse deflection of said plates;
- and
- a foil between said pneumatic cushion and said plates.
4 more elements
A pneumatically operated actuator comprising:
- a frame;
- a pair of generally parallel, mutually spaced apart sheet-metal spring plates in said frame and secured to said frame at one side of said plates;
- a pin longitudinally shiftable in said frame and secured to an opposite side of said pair of plates;
- a pneumatic cushion formed between said plates and connectable to a source of compressed air whereby pressurization of said cushion deflects said plates transversely, thereby longitudinally shifting said pin;
- a spring on said frame yieldably counteracting transverse deflection of said plates;
- and
- a displacement-measuring device for measuring an axial stroke of said pin.
4 more elements
A pneumatically operated actuator comprising:
- a frame;
- a pair of generally parallel, mutually spaced apart sheet-metal spring plates in said frame and secured to said frame at one side of said plates;
- a pin longitudinally shiftable in said frame and secured to an opposite side of said pair of plates;
- a pneumatic cushion formed between said plates and connectable to a source of compressed air whereby pressurization of said cushion deflects said plates transversely, thereby longitudinally shifting said pin;
- a spring on said frame yieldably counteracting transverse deflection of said plates;
- and
- a measuring device for measuring deflection of one of said plates perpendicular to a direction of displacement of said pin.
4 more elements
Dependencies are inferred from the claim text.