Wherein Tool Is Retracted By Pinch Rolls Acting On Rectilinearly Moving Tool-support Patents (Class 72/439)
  • Patent number: 4204420
    Abstract: A laminated veneer hammerboard for a drop forge press comprised of a series of plies of hard, high density wood preferably of the order of a peeled hard maple veneer with the grain of at least most of said veneer plies running along its length, each of said plies of the hammerboard having a thickness in the range of 1/32" to 3/16", and glue deposited between the plies securing the plies together and providing a relatively large number of hard glue surfaces enhancing the wearability of the board. Vertical edges of each ply being disposed at opposite ends of the hammerboard rather than along the width thereof, thus enabling each roller to engage an outer side surface of the outermost ply on each side of the hammerboard rather than directly against opposite vertical edges of each ply.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: May 27, 1980
    Assignee: Marion Plywood Corporation
    Inventors: Thomas E. Rogers, Richard J. Rogers, Peter T. Rogers, James G. Rogers
  • Patent number: 4204421
    Abstract: A laminated veneer hammerboard for a drop forge press comprised of a series of plies of hard, high density wood preferably of the order of a peeled hard maple veneer with the grain of at least most of said veneer plies running along its length, each of said plies of the hammerboard having a thickness in the range of 1/32" to 3/16", and glue deposited between the plies securing the plies together and providing a relatively large number of hard glue surfaces enhancing the wearability of the board, said plies having opposite vertical edges positioned for edgewise engagement with lift rollers on a drop forge press.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: May 27, 1980
    Assignee: Marion Plywood Corporation
    Inventors: Thomas E. Rogers, Richard J. Rogers, Peter T. Rogers, James G. Rogers