Abstract:
The apparatus comprises an internal and/or external multiple-stage cooling device (40, 47) arranged coaxially with a drawing orifice (H) of an axtruder die (E), and having multi-level tangential outlets for the coolant to stabilize a non-stabilized section (M) of the expanded foil hose (F) by spiral coolant streams (46, 48). The internal device (40) comprises cooling units (41-44) arranged at axial distance from each other, surrounding the foil section (M) through a gap (G1). Each cooling unit (41-44) is connected to a coolant supply (45) to supply the coolant of selectively adjustable temperature.The external cooling device (47) comprises at least two cooling units (47.1, 47.2, 47.3) arranged at axial distance from each other, surrounding the foil section (M) through a gap (G). Each cooling unit (41-44) is provided with tangential inlets (17, 18) and is connected to a coolant supply (60) to supply the coolant of selectively and individually adjustable temperature and/or volume and/or pressure.
Abstract:
The articular cartilage according to the invention is made of pure cartilage and is provided with incisions (12) on the surface facing the bone. The cartilage cells are preferably seeded on the surface provided with incisions (12). The method for producing the articular cartilage comprises the step of collecting cartilage from joints, wherein pure cartilage is collected without bone, and incisions are made on the surface of the cartilage intended to face the bone. It is preferably fresh frozen until use. The device for harvesting articular cartilage, comprises handle and cutting blade, wherein the cutting blade (4) is curvilinear and is pro-vided with spacer elements (5), meanwhile the device for producing incisions in articular cartilages comprises handle (2) and a bridge (3) connected to said handle (2) and being provided with one or more cutting blade(s) (4). During the method for applying the articular cartilage the articular cartilage is fixed by thin surgical yarn stitches, by fibrin glue or by small anchors (Fig.8).
Abstract:
This invention relates to a method for cooling extruded plastic foil hose (F), which is cooled down by driving a pressurized coolant along the internal and/or external skirt of the foil hose (F). The coolant is fed in the area of a drawing aperture (4) tangentially to the foil hose (F), and the coolant thus generated is driven as a spiral stream (16, 17) from the tangential inlet (6) to the outlet by a centrifugal force affecting the coolant along the internal and/or external surface of the foil hose (F), and by the density and pressure differences between various parts of the coolant. Said apparatus (1) comprises an internal cooling unit (1B) equipped with a distribution drum (2) provided with nozzles (13) with tangential inlets (13A). Its external cooling unit (1A) has a tangential inlet (6), which is in connection with a ring channel (G) around the foil hose (F), delimited by a tubular element (5, P).