Assignee
ROBERTS CORP
US15 patents
Top patents by PatentIndex Score
US4971515ANov 20, 1990
Apparatus for moving individual sheets from a stack of sheets
ROBERTS CORP47 citations89
US4804173AFeb 14, 1989
Method and apparatus for moving individual sheets from a stack of sheets
ROBERTS CORP44 citations89
US4836269AJun 6, 1989
Forming apparatus having catalyst introduction simultaneous with sand injection
ROBERTS CORP21 citations78
US4830082AMay 16, 1989
Machine and method for making molds using an activating gas
ROBERTS CORP10 citations71
US4757855AJul 19, 1988
Method and apparatus for loading and unloading tooling from a foundry machine
ROBERTS CORP8 citations71
US4846073AJul 11, 1989
Selective delivery arrangement for self propelled pallet vehicles
ROBERTS CORP18 citations70
US4210194AJul 1, 1980
Automatic method for producing molds using chemically bonded sands
ROBERTS CORP8 citations68
US4137675AFeb 6, 1979
Sand reclaimer
ROBERTS CORP11 citations68
US4074744AFeb 21, 1978
Automatic apparatus for producing molds using chemically bonded sands
ROBERTS CORP8 citations68
US4718474AJan 12, 1988
Mold transfer mechanism for a molding machine
ROBERTS CORP5 citations60
US4714100ADec 22, 1987
Method and apparatus for changing a mold box on a molding machine
ROBERTS CORP5 citations60
US4112999ASep 12, 1978
Conveyor control system
ROBERTS CORP17 citations60
US4233907ANov 18, 1980
Mold conveyor drive assembly
ROBERTS CORP9 citations58
US4883558ANov 28, 1989
Method and apparatus for bonding pairs of mold shells into molds
ROBERTS CORP6 citations57
US4191239AMar 4, 1980
Blow plate structure and mold formed thereby
ROBERTS CORP0 citations36