Insert for placement in a vessel and method of forming the insert

A method of making a tube or other vessel comprising an elongate tubular portion having positioned therein an insert to contact fluid therein comprising taking an insert comprising an elongate core having a plurality of loops disposed longitudinally therealong and angularly thereabout wherein a portion of each loop lies in close proximity to a first conceptual surface of a cross-sectional sectional configuration greater than that of said tubular portion so that laterally rectilinear lines extending from the core to the mid point of the portion of a respective loop in close proximity to said first surface are disposed at different longitudinal positions along the core and at different angular orientations around the core, and acting on said loops to cause a portion thereof to lie in close proximity to a second conceptual surface having a cross-sectional configuration substantially equal to that of the tubular portion, prior to positioning in said tubular portion, so that the portion in close proximity to said second conceptual surface is a greater proportion of the loop perimeter than that which was in close proximity to the first conceptual surface.

A method according to either one of the preceding claims wherein said loops are acted upon by being deformed from a first configuration which they have when said part is in close proximity to said first surface to a second configuration which they have when said part is in close proximity to said second surface.

An insert for placement in a vessel to contact fluid therein comprising an elongate core having a plurality of loops of filamentary material disposed longitudinally therealong and angularly thereabout wherein a portion of each loop has been acted on to be moved from a first conceptual enveloping surface to a second conceptual enveloping surface of smaller cross section than said first conceptual surface, prior to placement in said vessel, so that laterally rectilinear lines extending from the core to a mid point of the portion of a respective loop in close proximity to said second conceptual surface are disposed at different longitudinal positions along the core and different angular orientations around the core, and wherein each line of each loop lies in a loop surface inclined to the longitudinal axis of the core at an acute angle when said line is longitudinally rectilinear or said line being longitudinally curved and said line of the loop and said axis of the core lying in a plane containing the core and extending radially therefrom.

A method of making an insert for placement in a vessel to contact fluid therein comprising the steps of taking an insert comprising an elongated core having a plurality of loops disposed longitudinally therealong and angularly thereabout, each loop comprising at least one turn of a helical coil and the core comprising at least two elongate elements twisted together and a part of each of said loops being held between the twisted together elements, wherein a portion of each loop lies in close proximity to a first conceptual enveloping surface so that laterally rectilinear lines extending from the core to a mid point of the portion of a respective loop in close proximity to said first surface are disposed at different longitudinal positions along the core and at different angular orientations around the core, and acting on said loops to cause a portion thereof to lie in close proximity to a second conceptual enveloping surface of smaller cross section than said first conceptual surface, prior to placement in said vessel, so that the portion in close proximity to said second conceptual surface is a greater proportion of the loop perimeter than that which was in close proximity to the first conceptual surface.

A method of making a tube or other vessel comprising an elongate tubular portion having positioned therein an insert to contact fluid therein comprising taking an insert comprising an elongate core having a plurality of loops disposed longitudinally therealong and angularly thereabout, each loop comprising at least one turn of a helical coil and the core comprising at least two elongate elements twisted together and a part of each of said loops being held between the twisted together elements, wherein a portion of each loop lies in close proximity to a first conceptual surface of a cross-sectional configuration greater than that of said tubular portion so that laterally rectilinear lines extending from the core to the mid point of the portion of a respective loop in close proximity to said first surface are disposed at different longitudinal positions along the core and at different angular orientations around the core, and acting on said loops to cause a portion thereof to lie in close proximity to a second conceptual surface having a cross-sectional configuration substantially equal to that of the tubular portion, prior to positioning in said tubular portion, so that the portion in close proximity to said second conceptual surface is a greater proportion of the loop perimeter than that which was in close proximity to the first conceptual surface.

An insert for placement in a vessel to contact fluid therein comprising an elongate core having a plurality of loops of filamentary material disposed longitudinally therealong and angularly thereabout, each loop comprising at least one turn of a helical coil and the core comprising at least two elongate elements twisted together and a part of each of said loops being held between the twisted together elements, wherein a portion of each loop has been acted on to be moved from a first conceptual enveloping surface to a second conceptual enveloping surface of smaller cross section than said first conceptual surface, prior to placement in said vessel, so that laterally rectilinear lines extending from the core to a mid point of the portion of a respective loop in close proximity to said second conceptual surface are disposed at different longitudinal positions along the core and different angular orientations around the core, and wherein each line of each loop lies in a loop surface inclined to the longitudinal axis of the core at an acute angle when said line is longitudinally rectilinear or said line being longitudinally curved and said line of the loop and said axis of the core lying in a plane containing the core and extending radially therefrom.