Unit dose bulk material sampling apparatus with controlled pressure applicator

A sampler apparatus for unit dose bulk material sampling, comprising:

• an elongated housing having a length, an axis coextensive with said length, a first bore extending in the direction of said axis the length of said housing, a from end having a front opening aligned with said first bore, said front end and front opening lying in a plane substantially perpendicular to the axis, and a back end;
• a moveable piston rod supported in said first bore, comprising a front surface in a plane perpendicular to the axis and a shaft extending from said front surface in a direction opposite said front surface in the direction of said axis, the front surface having a diameter substantially equivalent to the diameter of the first bore;
• a sampling cavity formed within the first bore and extending between the from surface of the piston rod and the front end of the housing, wherein the front opening of the front end of the housing forms an entrance to the sampling cavity;
• adjusting means for selectively varying the position of the front surface of the piston in the first bore for adjusting, presetting, and locking the size of the sampling cavity;
• a closure cap attached to said housing and having means for selectively controlling opening and closing said entrance to the sampling cavity;
• and
• a cam follower connected to the piston rod, for moving said moveable piston rod a predetermined distance in the direction of said axis whereby the sampling cavity is reduced in size by a predetermined amount, said cam follower comprising:
• a neck portion having at least one cam attached thereto;
• and
• a compacting knob.