Sawmill apparatus having cant supporting means
AssigneeSeneca Sawmill Company, Inc.
InventorsAaron U. Jones, Marcel R. Trudeau, deceased, by Claire Trudeau, administratrix
Life of this patent
Estimating the term…
Abstract
A sawmill apparatus includes first and second carriages for supporting first and second logging dogs therebeneath, with the second carriage being movable upon the first whereby to engage the ends of a log between the dogs. The carriages support the dogs at the end of steel baldes which are moved in a vertical direction by a combination of air cylinders and ball screws to provide the desired positioning of the log in a vertical direction. As the carriages urge the log between the blades of a bandsaw, rubber tired wheels are raised against the underside of the log for supporting cants or boards sawn therefrom and preventing splitting at the finally sawn edge.
Claims23
In a sawmill having a log carriage for receiving a log and carrying the same in a path generally longitudinal thereof and a saw disposed in line with the path of said carriage for sawing boards or cants from said log,
- the improvement comprising means for engaging the underside of said log after said log is engaged by said carriage and as said log is being sawed by said saw for supporting boards or cants as still partially joined to said log to prevent damage thereto as said boards or cants are sawed from said log.
In a sawmill having a log carriage for receiving a log and carrying the same in a path generally longitudinal thereof and a saw disposed in line with the path of said carriage for sawing boards or cants from said log,
- the improvement comprising compliant means for engaging the underside of said log, as said log is moved by said carriage, to suport boards or cants as still partially joined to said log to prevent damage thereto as said boards or cants are sawed from said log.
In a sawmill having a carriage provided with dogging means for receiving and engaging the ends of a log, said carriage being movable in a path substantially longitudinal of said log, and a saw disposed in line with the path of said carriage for sawing boards or cants from said log as said carriage moves relative to said saw,
- the improvement comprising a rotatable member disposed along the path of said carriage and having a horizontal axis of rotation transverse to the path of said carriage, and means for positioning said rotatable member substantially immediately adjacent and underneath the path of said log for engaging the underside of said log during sawing thereof, said rotatable member being disposed along said path downstream of the location where said log is sawn by said saw in order to support boards and cants sawed from said log whereby to prevent damage to said boards or cants as they are sawed from said log.
In a sawmill having a carriage provided with dogging means for receiving and engaging the ends of a log, said carriage being movable in a path substantially longitudinal of said log, and a saw disposed in line with the path of said carriage for sawing boards or cants from said log as said carriage moves relative to said saw,
- the improvement comprising a rotatable member disposed along the path of said carriage and having a horizontal axis of rotation transverse to the path of said carriage, and means for positioning said rotatable member substantially immediately adjacent the path of said log for engaging the underside of said log after the same passes said saw to support boards and cants sawn from said log whereby to prevent damage to said boards or cants as they are sawn from said log,
- wherein said rotatable member comprises at least one wheel circumferentially formed of elastomeric material for engaging said log and said positioning means comprises actuator means for raising said wheel against the underside of said log after the same passes said saw.
In a sawmill having a log carriage for receiving a log and carrying the same in a path generally longitudinal thereof and a saw disposed in line with the path of said carriage for sawing boards or cants from said log,
- the improvement comprising compliant means for engaging the underside of said log as said log is moved by said carriage to support boards or cants and prevent damage thereto as said boards or cants are sawed from said log, said compliant means comprising a plurality of pneumatic tires,
- and including means for urging said compliant means against the underside of said log after said log is engaged by said carriage, said means for urging comprising air cylinder means for raising said pneumatic tires against the underside of said log.
Dependencies are inferred from the claim text.