Frederick W Mershimer

US Patent:

20070126268, Jun 7, 2007

Filed:

Nov 18, 2005

Appl. No.:

11/282124

Inventors:

Frederick Mershimer - Brooklyn NY, US

International Classification:

A47C 3/02

US Classification:

297133000

Abstract:

The rocker machine of the invention can be worked to produce uniformly engraved plates of any size and suitable for mezzotint engraving. The rocker machine includes a table, a rocker assembly and a guide assembly. The table can be rotatable or fixed, and is inclined at an angle to the horizontal. The rocker assembly includes one or more rockers, one or more lateral members and a cross arm. Each rocker has a curved lower edge along which protrude a plurality of teeth. The lateral members are adapted for reciprocal translation along a horizontal axis, and are moveable along an axis substantially perpendicular to the plane of the rocker. The lateral members are attached at the proximal end to the rocker or to the cross arm and at the distal end are moveable along lateral guides. The cross arm is reciprocally moveable in a horizontal direction substantially in the plane of the rocker (or substantially in a plane, parallel to the plane of the rocker) and is moveable along an axis substantially perpendicular to the plane of the rocker. This reciprocal motion is sufficient to permit each rocker to rock along its curved edge, causing the teeth to penetrate the surface of the plate along the direction of rocking along the axis substantially perpendicular to the plane of the rocker, thereby produce indentations and burrs in the plate.