A knitting machine part comprises a plurality of tool guides, each for one knitting tool. Each tool guide has a hardened region. The majority of the hardened regions are formed to be integral without seams or joints which transition integrally into adjacent, non-hardened regions. At least one hardened region of the knitting machine part is formed by a non-integral region, in that a hardened, separate component is arranged there, which forms the non-integral hardened region. The component can be designed as an insert part and inserted in a receptacle recess. The integral regions are preferably formed by induction hardening of a knitting machine part which is not yet hardened, wherein a separate hardened component can be arranged in each insufficiently hardened region in order to provide a hardened, non-integral region.

A knitting machine part comprises a plurality of tool guides, each for one knitting tool. Each tool guide has a hardened region. The majority of the hardened regions are formed to be integral without seams or joints which transition integrally into adjacent, non-hardened regions. At least one hardened region of the knitting machine part is formed by a non-integral region, in that a hardened, separate component is arranged there, which forms the non-integral hardened region. The component can be designed as an insert part and inserted in a receptacle recess. The integral regions are preferably formed by induction hardening of a knitting machine part which is not yet hardened, wherein a separate hardened component can be arranged in each insufficiently hardened region in order to provide a hardened, non-integral region.

A method for providing semi-finished tubular manufactured articles to be closed by stitching at an axial end thereof for the production of socks, comprising a step of providing the body of the tubular manufactured article and a step of providing an end portion of the tubular manufactured article which comprises: —a step of providing an intermediate band connected to the body of the manufactured article and thinner than the thickness at least of the rows of knitting of the body of the manufactured article which are connected to the intermediate band; —a step of providing an end edge thicker than the thickness of the intermediate band; the height of the intermediate band, proximate to the regions that constitute the lateral ends of the two flaps of the end portion to be overlapped in order to stitch the axial end to be closed of the tubular manufactured article, is lower than the height of the remaining part of the intermediate band.

A method for providing semi-finished tubular manufactured articles to be closed by stitching at an axial end thereof for the production of socks, comprising a step of providing the body of the tubular manufactured article and a step of providing an end portion of the tubular manufactured article which comprises: —a step of providing an intermediate band connected to the body of the manufactured article and thinner than the thickness at least of the rows of knitting of the body of the manufactured article which are connected to the intermediate band; —a step of providing an end edge thicker than the thickness of the intermediate band; the height of the intermediate band, proximate to the regions that constitute the lateral ends of the two flaps of the end portion to be overlapped in order to stitch the axial end to be closed of the tubular manufactured article, is lower than the height of the remaining part of the intermediate band.

A process to close an end of a tubular manufactured article directly on hosiery and knitwear circular machines, a respective circular machine and a respective device are described. The process provides that a respective stitch is collected from each needle of at least one first half of adjacent needles of the machine cylinder; the stitches are arranged on corresponding needles of a second half of adjacent cylinder needles, so that each of the needles of the second half of the needles carries a pair of stitches of the last course, which are arranged, at first, on opposite cylinder needles with reference to a diameter of the cylinder; at least one yarn is fed to the cylinder needles; and the pairs of stitches are joined together and the end of the tubular manufactured article is closed, by processing the yarn with the needles of the second half of the cylinder needles.

A process to close an end of a tubular manufactured article directly on hosiery and knitwear circular machines, a respective circular machine and a respective device are described. The process provides that a respective stitch is collected from each needle of at least one first half of adjacent needles of the machine cylinder; the stitches are arranged on corresponding needles of a second half of adjacent cylinder needles, so that each of the needles of the second half of the needles carries a pair of stitches of the last course, which are arranged, at first, on opposite cylinder needles with reference to a diameter of the cylinder; at least one yarn is fed to the cylinder needles; and the pairs of stitches are joined together and the end of the tubular manufactured article is closed, by processing the yarn with the needles of the second half of the cylinder needles.

A sample injection device (100) includes a tubular suction and discharge unit (23) configured to suction a liquid sample (S), contain the sample therein, and discharge the suctioned sample, and at least a portion of an inner wall (23a) of the suction and discharge unit, the portion having the sample contained therewithin, is subjected to a surface treatment (V) to increase an interfacial tension (F) that acts between the inner wall and the sample.

A circular hosiery knitting machine, particularly of the double cylinder type, with yarn finger for plated knitting, comprising at least one needle cylinder and a first yarn finger for dispensing a base yarn and a second yarn finger for dispensing a reinforcement yarn; the dispensing end of the body of the second yarn finger can move on command with respect to the remaining part of the body of the second yarn finger, on a plane that is substantially perpendicular to the axis of the needle cylinder, along a direction that is substantially parallel to the tangent to the needle cylinder in the grip point, by needles, of a reinforcement yarn dispensed by the second yarn finger.

A needle-holding element for circular knitting machines, having a structure as a hollow solid of rotation developing around a central axis and configured for rotating and for supporting a plurality of needles moving so as to produce a knitted fabric; the needle-holding element has at least one working surface shaped as a surface of rotation obtained through the rotation of a portion of generating straight line around the central axis; on the working surface a plurality of needle seats is defined, placed one beside the other and arranged circumferentially or radially around the central axis, wherein each needle seat movably houses at least a portion of at least one respective needle. At least one needle seat has at least a first length has a longitudinal development, on the working surface, inclined with respect to the generating straight line.

A needle-holding element for circular knitting machines, having a structure as a hollow solid of rotation developing around a central axis and configured for rotating and for supporting a plurality of needles moving so as to produce a knitted fabric; the needle-holding element has at least one working surface shaped as a surface of rotation obtained through the rotation of a portion of generating straight line around the central axis; on the working surface a plurality of needle seats is defined, placed one beside the other and arranged circumferentially or radially around the central axis, wherein each needle seat movably houses at least a portion of at least one respective needle. At least one needle seat has at least a first length has a longitudinal development, on the working surface, inclined with respect to the generating straight line.