Roll or roller – Concentric layered annulus – Specific composition
Reexamination Certificate
1999-10-07
2001-08-07
Rosenbaum, I Cuda (Department: 3726)
Roll or roller
Concentric layered annulus
Specific composition
C492S036000, C492S045000, C492S040000
Reexamination Certificate
active
06270450
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a guide roller for web material in particular for paper handling machinery.
BACKGROUND OF THE INVENTION
In known guide rollers of this type (DE 196 22 238 C1), two outer tube sections and a middle tube section are connected through couplings so as to rotate in unison. All tube sections are rigid. These guide rollers are used solely to align the web material.
Also known is a guide roller (DE-AS 11 78 257) that has two outer tube sections and a center tube section that is arranged therebetween. The outermost tube sections are supported on a central shaft through ball bearings. The ends—on the one hand of the outer tube sections and on the other hand of the central tube section—that are adjacent to each other fit around each other and are joined to each other so as to be rotationally fixed. The tube sections are supported by the bail bearings in the overlap area where the tubes fit around each other. In known guide rollers of this type the outer ends of the outer tube sections cannot be adjusted radially relative to the shaft. In addition, in the case of this known guide roller, since all the tube sections are configured so as to be rigid in and of themselves, such guide rollers can be used only to align the web material.
Also known are transverse-tightening rollers that tighten the web material solely across its width. Such transverse-tightening rollers incorporate a plurality of individually supported tube sections that are arranged in an arc; all of these are joined by way of couplings so as to rotate in unison. It is also known that all of the tube sections can incorporate slits that extend part way around the periphery of the tube section and are offset relative to each other, so as to make the tube sections elastic.
SUMMARY OF THE INVENTION
Proceeding from the known prior art, it is the objective of the present invention to create a guide roller that can also act as a transverse-tightening roller and that requires a relatively small amount of drive power.
This objective has been achieved with the features of the present invention: guide roller for web material for paper-handling machinery. The guide roller includes two outer tube sections and optionally at least one tube section arranged therebetween, the tube sections being supported on a central shaft through ball bearings, the outer tube being adjustable radially relative to the shaft at their outer ends. The ends of adjacent tube sections that are adjacent to each other fit into each other and are connected directly to each other so as to be non-rotatable, the ball bearing being situated beneath the area of overlap and the outer tube sections being configured elastically in the longitudinal direction.
The guide roller according to the present invention is of simple construction and can act as both a guide roller and a transverse-tightening roller; it is thus universally usable.
REFERENCES:
patent: 691011 (1902-01-01), Sheehan
patent: 1883184 (1932-10-01), Weber
patent: 3951484 (1976-04-01), Bowman
patent: 3957147 (1976-05-01), Specht
patent: 3964658 (1976-06-01), Edwards
patent: 1 164 653 (1956-04-01), None
patent: 1 106 593 (1957-06-01), None
patent: 11 78 257 B (1964-09-01), None
patent: 33 11 095 (1984-10-01), None
patent: 196 22 238 C (1997-09-01), None
patent: 6-263300 (1994-09-01), None
patent: 6-263301 (1994-09-01), None
patent: 6-277734 (1994-10-01), None
Connolly Bove Lodge & Hutz
Cuda Rosenbaum I
Stowe Woodward AG
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