Abstract: A gel extraction device comprising a hollow cutting member having a cutting edge at one end and a squeeze bulb at the other end. In a further embodiment, the air passage between the cutting edge and the bulb has a constriction zone to prevent any extracted gel from being drawn too deeply into the extractor. In a further embodiment, a blow-hole in the hollow cutting member or in the squeeze bulb provides for the passage of air displaced by gel through the extractor. The blow-hole may be covered to secure the gel in the receptacle for transfer from the matrix to a sample container.

Abstract: A gel extraction device comprising a hollow cutting member having a cutting edge at one end and a squeeze bulb at the other end. In a further embodiment, the air passage between the cutting edge and the bulb has a constriction zone to prevent any extracted gel from being drawn too deeply into the extractor. In a further embodiment, a blow-hole in the hollow cutting member or in the squeeze bulb provides for the passage of air displaced by gel through the extractor. The blow-hole may be covered to secure the gel in the receptacle for transfer from the matrix to a sample container.

Abstract: A gel extraction device comprising a hollow cutting member and a plunger ejector member. The hollow cutting member has a proximal tubular body terminating at one end in a circular rim having oppositely disposed spring engaging structures and a distal sloped transition portion ending in a rectangular receptacle and a tapered end portion with a sharp perimeter cutting edge. The plunger ejector member has a proximal cap atop and connected to a split stem portion having outer legs with shoulder stop extensions; an inner ribbon spring leg having a distal end inserted into a spring engaging structure in the assembled device; and a solid rectangular distal portion. In a second embodiment the split end portion is replaced by a stem having a plurality of lateral protrusions and a coiled spring is placed within the hollow cutting member tubular body. A third embodiment is a hybrid of the first two embodiments.

Abstract: A tray for coating fluids and paints for use with a roller comprising a deep well section, a gradually-sloped section, a brush rest section, tray legs extending downward along a slanted vertical line, horizontal extensions at the bottom of said tray legs, substantially vertical walls terminating in a wall lip at a uniform height, said tray being characterized by an underside which is generally complementary to the configuration of the top side, said tray being stabilized by a plurality of ribs extending generally longitudinally of said tray beneath the brush rest section, whereby a plurality of said trays may be nested within each other when not in use, and being further characterized by an excellent rigidity of structure and minimal deformation when said tray is in use and filed with a coating fluid.