Gap adjusting mechanism for rolls on a roll stand used in the extrusion forming of a sheet product

A roll stand for use in the extrusion forming of a sheet product from a flowable material, the roll stand comprising:

• a main frame;
• a plurality of rolls including at least first and second rolls between which there is a first gap through which at least one sheet layer passes during sheet product formation,
• the first and second rolls each having spaced end supports through which the first and second rolls are maintained operatively positioned upon the main frame for movement respectively around first and second substantially parallel axes;
• and
• a first adjusting mechanism through which the first roll can be moved relative to the second roll so as to vary a dimension of the first gap to accommodate sheet layers of different thickness,
• the first adjusting mechanism comprising a first element that is movable to cause repositioning of one of the end supports on the first roll and a first actuator for causing movement of the first element,
• the first actuator:
• a) maintained on the apparatus;
• b) engageable by a hand of an operator;
• and c) manually movable through an operator's hand in a first predetermined manner to thereby cause incremental movement of the first element so as to thereby cause repositioning of the one of the end supports on the first roll and thereby the first roll relative to the second roll to change the dimension of the first gap.