Threading assembly for a yarn entangling nozzle

A yarn entangling device for multifilament yarns, comprising:

• a housing having a compressed air inlet and a chamber within for defining an air pressure cushion;
• a piston supported in the housing and extending into the compressed air cushion, the piston extending through a passage out of the housing and out of the compressed air cushion;
• the piston having a side facing out of the housing;
• an air passage communicating through the piston and having an outlet through the side of the piston facing out of the housing, the air passage through the piston having an inlet on the piston placed such that with the piston moved into the housing, the inlet to the air passage is exposed to the air cushion and with the piston moved more out of the housing, the housing supporting the piston blocks the inlet to the air passage;
• a blast nozzle attached to and moveable with the piston and including a nozzle inlet communicating with the piston outlet;
• the blast nozzle having an outlet surface with a shape for defining a yarn channel;
• an air pathway through the blast nozzle from the piston air outlet and to a blast nozzle outlet into the yarn channel for delivering an air blast from the housing into the yarn channel;
• a baffle plate opposed to the blast nozzle outlet and cooperating with the blast nozzle for defining the yarn channel which extends past the blast nozzle outlet;
• a holder on which the baffle plate is supported;
• the holder being moveable to a closed operating position which supports the baffle plate against the blast nozzle for urging the piston into the housing sufficiently for opening the inlet to the air passage through the piston, and the holder being moveable to an open piston for moving the baffle plate away from the blast nozzle, thereby freeing the piston for being moved so as to block the air inlet through the air passage through the piston when the baffle plate is away from the blast nozzle and the yarn channel is thereby opened;
• a closing device operable for securing the holder to the housing for moving the baffle plate against the blast nozzle for opening the air inlet passage to the piston, and the closing device being operable for releasing the holder to move with the baffle plate away from the blast nozzle, to free the piston and thereby close the air inlet to the air passage through the piston;
• the closing device comprising an opening and closing flap which is supported on the housing and is moveable with respect to the housing so as to engage the holder when the holder is in the closed position with the baffle plate at the yarn channel, and the flap being operable to release the holder to be opened into the open position away from the blast nozzle;
• biasing means for normally urging the holder to the open position with the baffle plate away from the blast nozzle;
• a pivot for the holder to pivot the holder between the open and closed position;
• and
• a spring connected with the holder for causing the holder to pivot to move the baffle plate away from the blast nozzle.

A yarn entangling device for multifilament yarns, comprising:

• a housing having a compressed air inlet and a chamber within for defining an air pressure cushion;
• a piston supported in the housing and extending into the compressed air cushion, the piston extending through a passage out of the housing and out of the compressed air cushion;
• the piston having a side facing out of the housing;
• an air passage communicating through the piston and having an outlet through the side of the piston facing out of the housing, the air passage through the piston having an inlet on the piston placed such that with the piston moved into the housing, the inlet to the air passage is exposed to the air cushion and with the piston moved more out of the housing, the housing supporting the piston blocks the inlet to the air passage;
• a blast nozzle attached to and moveable with the piston and including a nozzle inlet communicating with the piston outlet;
• the blast nozzle having an outlet surface with a shape for defining a yarn channel;
• an air pathway through the blast nozzle from the piston air outlet and to a blast nozzle outlet into the yarn channel for delivering an air blast from the housing into the yarn channel;
• a baffle plate opposed to the blast nozzle outlet and cooperating with the blast nozzle for defining the yarn channel which extends past the blast nozzle outlet;
• a holder on which the baffle plate is supported;
• the holder being moveable to a closed operating position which supports the baffle plate against the blast nozzle for urging the piston into the housing sufficiently for opening the inlet to the air passage through the piston, and the holder being moveable to an open piston for moving the baffle plate away from the blast nozzle, thereby freeing the piston for being moved so as to block the air inlet through the air passage through the piston when the baffle plate is away from the blast nozzle and the yarn channel is thereby opened;
• a closing device operable for securing the holder to the housing for moving the baffle plate against the blast nozzle for opening the air inlet passage to the piston, and the closing device being operable for releasing the holder to move with the baffle plate away from the blast nozzle, to free the piston and thereby close the air inlet to the air passage through the piston;
• the closing device comprising an opening and closing flap which is supported on the housing and is moveable with respect to the housing so as to engage the holder when the holder is in the closed position with the baffle plate at the yarn channel, and the flap being operable to release the holder to be opened into the open position away from the blast nozzle;
• biasing means for normally urging the holder to the open position with the baffle plate away from the blase nozzle;
• and
• a pivot for the holder to pivot the holder between the open and closed position;
• wherein the biasing means comprises a torsion spring attached to the holder at the pivot thereof.

A yarn entangling device multifilament yarns, comprising:

• a housing having a compressed air inlet and a chamber within for defining an air pressure cushion;
• a piston supported in the housing and extending into the compressed air cushion, the piston extending through a passage out of the housing and out of the compressed air cushion;
• the piston having a side facing out of the housing;
• an air passage communicating through the piston and having an outlet through the side of the piston facing out of the housing, the air passage through the piston having an inlet on the piston placed such that with the piston moved into the housing, the inlet to the air passage is exposed to the air cushion and with the piston moved more out of the housing, the housing supporting the piston blocks the inlet to the air passage;
• a blast nozzle attached to and moveable with the piston and including a nozzle inlet communicating with the piston outlet;
• the blast nozzle having an outlet surface with a shape for defining a yarn channel;
• an air pathway through the blast nozzle from the piston air outlet and to a blast nozzle outlet into the yarn channel for delivering an air blast from the housing into the yarn channel;
• a baffle plate opposed to the blast nozzle outlet and cooperating with the blast nozzle for defining the yarn channel which extends past the blast nozzle outlet;
• a holder on which the baffle plate is supported;
• the holder being moveable to a closed operating position which supports the baffle plate against the blast nozzle for urging the piston into the housing sufficiently for opening the inlet to the air passage through the piston, and the holder being moveable to an open piston for moving the baffle plate away from the blast nozzle, thereby freeing the piston for being moved so as to block the air inlet through the air passage through the piston when the baffle plate is away from the blast nozzle and the yarn channel is thereby opened;
• a closing device operable for securing the holder to the housing for moving the baffle plate against the blast nozzle for opening the air inlet passage to the piston, and the closing device being operable for releasing the holder to move with the baffle plate away from the blast nozzle, to free the piston and thereby close the air inlet to the air passage through the piston;
• the closing device comprising an opening and closing flap which is supported on the housing and is moveable with respect to the housing so as to engage the holder when the holder is in the closed position with the baffle plate at the yarn channel, and the flap being operable to release the holder to be opened into the open position away from the blast nozzle;
• biasing means for normally urging the holder to the open position with the baffle plate away from the blase nozzle;
• a pivot for the holder to pivot the holder between the open and closed position;
• and
• a detent on the holder and a detent nose on the closing flap, and the respective detent and detent nose being selectively connectable and separable for locking the holder closed to the housing.

A yarn entangling device for multifilament yarns, comprising:

• a housing having a compressed air inlet and a chamber within for defining an air pressure cushion;
• a piston supported in the housing and extending into the compressed air cushion, the piston extending through a passage out of the housing and out of the compressed air cushion;
• the piston having a side facing out of the housing;
• an air passage communicating through the piston and having an outlet through the side of the piston facing out of the housing, the air passage through the piston having an inlet on the piston placed such that with the piston moved into the housing, the inlet to the air passage is exposed to the air cushion and with the piston moved more out of the housing, the housing supporting the piston blocks the inlet to the air passage;
• a blast nozzle attached to and moveable with the piston and including a nozzle inlet communicating with the piston outlet;
• the blast nozzle having an outlet surface with a shape for defining a yarn channel;
• an air pathway through the blast nozzle from the piston air outlet and to a blast nozzle outlet into the yarn channel for delivering an air blast from the housing into the yarn channel;
• a baffle plate opposed to the blast nozzle outlet and cooperating with the blast nozzle for defining the yarn channel which extends past the blast nozzle outlet;
• a holder on which the baffle plate is supported;
• the holder being moveable to a closed operating position which supports the baffle plate against the blast nozzle for urging the piston into the housing sufficiently for opening the inlet to the air passage through the piston, and the holder being moveable to an open piston for moving the baffle plate away from the blast nozzle, thereby freeing the piston for being moved so as to block the air inlet through the air passage through the piston when the baffle plate is away from the blast nozzle and the yarn channel is thereby opened;
• a closing device operable for securing the holder to the housing for moving the baffle plate against the blast nozzle for opening the air inlet passage to the piston, and the closing device being operable for releasing the holder to move with the baffle plate away from the blast nozzle, to free the piston and thereby close the air inlet to the air passage through the piston;
• the closing device comprising an opening and closing flap which is supported on the housing and is moveable with respect to the housing so as to engage the holder when the holder is in the closed position with the baffle plate at the yarn channel, and the flap being operable to release the holder to be opened into the open position away from the blast nozzle;
• wherein the flap is pivotally supported to the housing to pivot between the open and closed positions;
• a spring connected with the flap for normally urging the flap to the position which would hold the holder so that the baffle plate closes the yarn channel with the blast nozzle, and cooperating detent means on the closing flap and on the holder so that the closing flap releasibly holds the holder closed forward of the blast nozzle.