MICROCOMPUTER BASED PAPER ROLL HARDNESS CONTROL FOR PAPER WINDING MACHINES

PLUMMET TYPE DENSITY MEASURING, DENSITY INDICATING AND DENSITY CONTROLLING INSTRUMENTS AND PARTS THEREOF (FOR USE IN MEASURING AND/OR INDICATING AND/OR CONTROLLING THE DENSITY OF LIQUIDS, HOMOGENEOUS LIQUID MIXTURES, AND HOMOGENEOUS MIXTURES OF ONE OR MORE LIQUIDS AND FINELY DISPERSED SOLIDS