Cutting – Cutting motion of tool has component in direction of moving... – Orbital motion of cutting blade
Patent
1979-03-09
1981-02-10
Yost, Frank T.
Cutting
Cutting motion of tool has component in direction of moving...
Orbital motion of cutting blade
83348, 83698, 83913, D01G 104
Patent
active
042494419
ABSTRACT:
This invention pertains to an improved blade retaining means for a blade roll used in a chopper assembly which severs continuous lengths of a material into discrete increments. Prior art devices provided blade retaining means which facilitated stress-inducing vibrations and generated stress concentrations in the ends of the blades. Attempts to cushion the blades using an elastomer blade restraining insert were incapable of eliminating contamination of the work product due to a severing of the insert when the blades were installed and used. Other blade retaining means were incapable of reuse and prevented use of the chopper blades directly from the manufacturer, i.e., all of the blades had to be cut to an exact and equal length. Accordingly, the present invention provides an improved blade retaining means comprising an annular blade retainer 52 positioned at each end of a blade roll cylinder member 50 wherein a side surface of each of the blade retainers 52 has at least one annular groove 62. Reusable blade retaining urethane rings 64 each have an annular bead 66 which is positioned within each annular groove 62 so that the blade retaining rings 64 engage chopper blades 34 at each end thereof in order to elastically restrain chopper blades 34, which need not be cut to an exact length, against movement in a direction circumferentially and radially of the blade roll cylinder member 50.
REFERENCES:
patent: 3508461 (1970-04-01), Stream
patent: 3644109 (1972-02-01), Klink et al.
patent: 3815461 (1974-06-01), Genson
patent: 3869268 (1975-03-01), Briar et al.
patent: 4083279 (1978-04-01), Wester et al.
Anderson William C.
Johns-Manville Corporation
Kelly Joseph J.
Krone Robert M.
Yost Frank T.
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