Method and apparatus for lifting pieces of material

Details Method and apparatus for lifting pieces of material Method and apparatus for lifting pieces of material

1985-01-09

1986-10-28

Yost, Frank T.

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

83 24, 83 27, 83 98, 83152, 83169, 836511, 414116, 414121, B26D 328, B26D 706

Patent

active

046191739

ABSTRACT:
To facilitate the lifting of slab-like pieces of material separated from a block of material by substantially horizontal cuts, with the aid of a movable suction device acting upon the upper surface of an upper slab-like piece of material, a pressurized gaseous medium is caused to act in the region of the cut between the upper piece of material and the underlying slab-like piece of material or residual part of the block of material, either prior to and/or while lifting said upper piece. The pressurized medium is supplied into a least one cavity which has an open side and is formed in a movable cover means arranged along a substantially vertical side of the block subsequent to moving the cover means to a position in which it is sealingly connected to and each open cavity side thereof is covered by a portion of said block side, which portion extends along and reaches above and below said region of the cut.

REFERENCES:
patent: 2217983 (1940-10-01), Hopkins
patent: 2848227 (1958-08-01), Gulick
patent: 4083908 (1978-04-01), Kalvenes et al.
patent: 4108933 (1978-08-01), Goransson et al.
patent: 4174936 (1979-11-01), Goransson
patent: 4197077 (1980-04-01), Kalvenes et al.
patent: 4458891 (1984-07-01), Kawaguchi
patent: 4470589 (1984-09-01), Singer

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