Knitted sock, and method of knitting a sock

Abstract

The present invention relates to a knitted sock (1) comprising a toe region (5), a midfoot region (10), and a heel region (15), and optionally a leg region. Said sock (1) advantageously comprises a knitted trapezoidal dorsal part (20) and a knitted trapezoidal plantar part (30) which are secured by knitted medial (40) and lateral (50) securing regions, and the knitted trapezoidal plantar and dorsal parts (20, 30), as well as the knitted medial and lateral securing regions (40, 50), extend into the toe region (15) and at least partly into the midfoot region (10). Figure for abstract: Fig. 3.

Description

Description Title of the invention: Knitted sock, and knitting method of a sock Technical field

[0001] The present invention relates to the technical field of knitted socks and methods of knitting said socks, in particular for practicing a sport. Prior art

[0002] — One-piece knitted socks usually include a pocket knitted located at the level of the toes for the reception of the toes, then a part tubular pocket receiving the midfoot, and finally a pocket receiving the heel. The pocket receiving the heel or toes is usually obtained by knitting a part trapezoidal upper part and a trapezoidal lower part. The tubular part located in the midfoot region, and between the toe and heel pockets, includes elastic threads to fit the midfoot area. In fact, this tubular shape does not correspond to the natural shape of the foot and is therefore not adapted to fit the foot. It is indeed sought after that knitted socks hug the foot to prevent textile portions of said sock from being loose or form folds and generate friction with the skin. However, the The sock should not be too tight on the foot in order to maintain comfort. These two criteria focused on comfort and fit are opposed, and difficult to satisfy, in par- particular when the knitted sock is intended to be worn for playing sports.

[0003] There is therefore a need for a one-piece knitted sock that is fitted to the foot but without tightening it too much, and which avoids the formation of areas of friction su- likely to generate blisters.

[0004] — At the same time, it is sought that knitted socks be recyclable. In this but it is necessary to reduce the number of different materials in the sock knitted. Generally, elastic threads are used to improve the fit of the sock on the foot and improve comfort. These elastic threads, including a core in an elastomeric material, complicate the dyeing of the sock, and are in a material different from the rest of the sock (for example, made of polyester or polyamide) which complicates recycling. Indeed, end-of-life items comprising elastic yarns based on elastane, being difficult to recycle, are buried or burned.

[0005] There is thus a need for a one-piece knitted sock which is fa- easily recyclable, adjusted to the foot while preserving comfort and avoiding formation of friction zones. Statement of the invention The present invention relates, according to a first aspect, to a knitted sock, in particular for practicing a sport, comprising a toe region, a midfoot region, and a heel region, and optionally a leg region, overcoming the aforementioned problems in that said knitted sock advantageously comprises a knitted trapezoidal dorsal part and a knitted trapezoidal plantar part which are secured by knitted medial and lateral securing regions. In addition, the knitted trapezoidal plantar and dorsal parts, and the knitted medial and lateral securing regions, extend into the toe region and at least partly into the midfoot region. Advantageously, the trapezoidal dorsal and plantar portions are knitted so as to extend at least into the midfoot region, and possibly to the border of the heel region. Advantageously, the knitted trapezoidal dorsal and plantar parts together form a knitted pocket, in particular having a substantially trapezoidal general shape, receiving the toes and partly the midfoot region, and possibly the entire midfoot region. This arrangement makes it possible to obtain a one-piece knitted sock that fits the foot, without the formation of folds or the creation of friction zones. The knitted sock according to the invention thus has an ergonomic shape, unlike socks of the prior art essentially comprising a tubular portion in the entire midfoot region. Advantageously, it is not necessary to knit one or more elastic threads into the trapezoidal dorsal and plantar parts so that the knitted pocket fits the shape of the foot, which allows the number of threads in different materials to be reduced, and facilitates dyeing. It has also been observed that the knitted dorsal part is decoupled from the knitted plantar part, and this on the medial and lateral sides of the sock by means of the knitted medial and lateral bonding regions independent of said trapezoidal plantar and dorsal parts, which allows the sock to remain correctly positioned on the foot without forming folds while following the movements of the foot. This technical effect is particularly advantageous when the sock is used for practicing a sport. In this text, the toe region of the knitted sock is understood to mean the region corresponding to the five toes of the foot (in particular corresponding to the phalanges of the foot). The knitted toe region of the knitted sock may at least partially cover, or completely, all five toes of the foot. In this text, the midfoot region of the knitted sock is understood to mean the region extending between the toe region and the heel region of the knitted sock, in particular the midfoot region includes the region corresponding to the metatarsals of the foot, and also includes the scaphoid, the cuboid, and the arch of the foot. The knitted midfoot region of the knitted sock may cover at least partially, or completely, the metatarsals, scaphoid, cuboid, and arch of the foot. In this text, the heel region of the knitted sock is understood to mean the region corresponding to the heel of the foot (in particular including the calcaneus). The knitted heel region of the knitted sock may at least partially, or completely, cover the heel. In this text, the leg region of the knitted sock is understood to mean the region corresponding to the leg, in particular including the malleolus and whose height varies. The height of the leg region is variable, and may extend halfway up the leg below the knee, or extend just below the knee, or above the knee. Preferably, a knitted trapezoidal part (whether plantar or dorsal, or even upper or lower when at the heel) comprises a large base and a small base substantially parallel to each other, and connected by lateral and medial sides converging towards the small base. Preferably, the large base corresponds to a row of knitted stitches comprising x stitches and the small base corresponding to a row of knitted stitches comprising y stitches, y being less than x, more preferably y is less than or equal to 0.7 * x, preferably y is less than or equal to 0.6 * x, more preferably y is less than or equal to 0.5 * x, in particular y is less than or equal to 0.4 * x. Preferably, the knitted trapezoidal dorsal, respectively plantar, part comprises a distal end and a proximal end, in particular corresponding to the small base and the large base defined respectively above. Preferably, the distal end corresponds to the furthest part of the leg of the knitted dorsal, respectively plantar, trapezoidal part, and the proximal end corresponds to the closest part of the leg of the knitted dorsal, respectively plantar, trapezoidal part. Preferably, the knitted trapezoidal dorsal, respectively plantar, part comprises a distal part and a proximal part, in particular arranged near the distal end and the proximal end respectively. Preferably, the knitted trapezoidal dorsal, respectively plantar, part comprises a medial edge, in particular arranged on the medial side of the sock. knitted, and a side edge, particularly arranged on the lateral side of the knitted sock. Preferably, the medial edge of the knitted trapezoidal dorsal portion is knittedly secured to the medial edge of the knitted trapezoidal plantar portion, particularly in the knitted medial securing region. Preferably, the lateral edge of the knitted trapezoidal dorsal part is knitted to the lateral edge of the knitted trapezoidal plantar part, particularly in the knitted lateral joining region. Preferably, the knitted trapezoidal dorsal portion has substantially the same dimensions as the knitted trapezoidal plantar portion, in particular the large base, the small base, and the medial and lateral sides of the knitted trapezoidal dorsal portion have substantially the same dimensions respectively as the large base, the small base, and the medial and lateral sides of the knitted trapezoidal plantar portion. Preferably, the knitted trapezoidal dorsal, or plantar, part is substantially in a single knitted trapezoid. In one embodiment, the foot insertion opening of the knitted sock is knitted and comprises a knitted border, in particular a ribbed edge a*b, a and b being integers other than 0 with possibly a equal to b. In one embodiment, the knitted sock comprises one or more yarns, in particular one or more fiber spun yarns, and / or one or more multifilament yarns, and / or one or more monofilament yarns. The yarn(s) of the knitted sock is / are in one or more material(s) chosen from the list including: polyesters, such as polyethylene terephthalate and polybutylene terephthalate, polyolefins, such as polypropylene and polyethylene, polyacrylics, polyamides, such as polyamide 6-6 or 6, cotton, viscose, linen, etc. Preferably, the knitted trapezoidal dorsal part and / or the knitted trapezoidal plantar part each comprises one or more spun fiber yarn(s) and / or one or more multifilament yarn(s), optionally textured, in particular which is / are in one or more materials chosen from the list comprising: polyesters (such as polyethylene terephthalate and polybutylene terephthalate) and polyamides. In one embodiment, the knitted medial, respectively lateral, securing region extends from the distal portion of the knitted dorsal, respectively plantar, trapezoidal portion into the midfoot region, or extends into the midfoot region and into the heel region. In one embodiment, the sock includes a knitted heel pocket for receiving all or a portion of the wearer's heel, particularly extending into the heel region of the sock. In one embodiment, the knitted medial, respectively lateral, joining region extends from the distal portion of the knitted trapezoidal dorsal, respectively plantar, portion to said knitted heel pocket, in particular said heel pocket comprises knitted upper and lower trapezoidal heel portions joined along their respective medial and lateral edges by knitting. In particular, the heel pocket has a generally trapezoidal shape. Preferably, the sock comprises a longitudinal axis L extending between its front and rear edges, and a transverse axis T extending between the medial and lateral edges of the sock, in particular the axis T is secant to the axis L, more particularly T and L are substantially perpendicular. In one embodiment, the knitted sock has a length ly extending between its front edge and its rear edge, in particular substantially parallel to its longitudinal axis L, and the knitted medial, respectively lateral, joining region extends over a portion of the length 1 of the sock and has a length 1;, |; is greater than or equal to 0.30 * 1, or 0.40 * 1, in particular less than or equal to 0.50 * Lu. In another embodiment, l, is greater than or equal to 0.50 * 1,, in particular l, is greater than or equal to 0.70 * 1, Preferably, the term “trapezoidal knitted dorsal part” means a part of the knitted sock arranged on the top of the foot when worn, in particular opposite the plantar part. Preferably, the term “trapezoidal knitted plantar part” means a part of the knitted sock arranged on the underside of the foot when worn, in particular facing the sole of the foot. In an alternative embodiment, the knitted medial or lateral bonding region extends from the toe region in the midfoot region, possibly substantially to the heel region, and is substantially straight or curved. In an alternative embodiment, the medial bonding region is substantially curved and the lateral bonding region is substantially curved, said medial and lateral bonding regions converging towards each other near the proximal portion or proximal end of the knitted trapezoidal dorsal portion. In an alternative embodiment, the knitted medial, respectively lateral, securing region comprises one or more binding threads knitted both in the knitted trapezoidal dorsal part and in the knitted trapezoidal plantar part, preferably said binding thread(s) is / are knitted alternately in the knitted trapezoidal dorsal part and in the knitted trapezoidal plantar part and this along the entire length of the medial and lateral solidarity region. Advantageously, said binding thread(s) form(s) one or more knitted sections extending between a medial edge, respectively lateral edge, of the knitted trapezoidal dorsal part and the corresponding edge (medial or lateral) of the knitted trapezoidal plantar part. In one embodiment, the medial, respectively lateral, securing region comprises one or more binding threads forming one or more knitted knots arranged along the medial, respectively lateral, edge of the knitted trapezoidal dorsal part, and along the medial, respectively lateral, edge of the knitted medial part. This arrangement allows for strengthening of the medial and lateral solidarity regions. In one embodiment, the medial, respectively lateral, securing region comprises one or more threads forming loaded stitches in the dorsal, respectively plantar, knitted trapezoidal part. This arrangement reduces the length of the knitted bonding yarn between the joined edges, and reduces elasticity. The loaded stitches improve stability and promote retention of the knitted shape. Advantageously, the length of the knitted binding yarn sections can vary. The edges of the dorsal and plantar parts can thus be separated by through openings or be joined. In this case, there are no through openings. It is also possible to combine these two aspects along the length of the joining regions depending on the desired technical effect. Advantageously, the length of the knitted binding thread(s) extending between the knitted trapezoidal dorsal and medial parts, and / or the type of mesh formed by said thread(s), makes it possible to bring the medial edges, respectively lateral edges, closer together to a greater or lesser extent, and possibly to form one or more through openings whose size varies. In an alternative embodiment, the knitted trapezoidal dorsal part and / or the knitted trapezoidal plantar part and / or the knitted trapezoidal upper heel part and / or the knitted trapezoidal lower heel part each comprises one or more transverse looped mesh reinforcement strips, in particular extending in a direction intersecting the longitudinal axis L of the knitted sock. In an alternative embodiment, the knitted trapezoidal back portion comprises one or more looped knitted areas, and / or the knitted trapezoidal plantar portion comprises one or more looped knitted areas, and / or the knitted trapezoidal upper heel portion comprises one or more looped knitted areas, and / or the knitted trapezoidal lower heel portion comprises one or more looped knitted areas, and / or the knitted leg portion comprises one or more looped knitted areas looped(s). These looped areas provide more textile material locally and can thus provide a cushioning or reinforcement function. In this text, looped knitted areas or looped mesh reinforcement strips are understood to mean a strip or area comprising looped meshes, i.e. meshes comprising elongated loops, in particular designated in the state of the art in English as terry loops. In an alternative embodiment, the knitted trapezoidal dorsal part, and / or the knitted trapezoidal plantar part, each comprises / comprise a first yarn and a second yarn, the first and second yarns are different, in particular by at least one characteristic chosen from: the color, the linear mass (dtex), the composition, and the structure (for example according to the number of filaments, the application of texturing or not to the yarn). In one embodiment, the knitted trapezoidal dorsal portion, and / or the knitted trapezoidal plantar portion each comprises a first yarn in a first color and a second yarn in a second color, the first color being different from the second color. In an alternative embodiment, the knitted trapezoidal upper heel portion, and / or the knitted trapezoidal lower heel portion, each comprises / comprise a first yarn and a second yarn, the first and second yarns are different, in particular by at least one characteristic chosen from: the color, the linear mass (dtex), the composition (for example the first yarn is made of polyamide 6-6 and the second yarn is made of polyethylene terephthalate), and the structure (for example according to the number of filaments, the application of texturing or not to the yarn). The knitting machine used for knitting the sock according to the invention advantageously makes it possible to knit at least two different yarns for the main trapezoidal knitted foot pocket and / or the trapezoidal knitted heel pocket, which was not possible before. This arrangement makes it possible to give the sock more functionality (cushioning, comfort, better ergonomics, reduced heating). In an alternative embodiment, the knitted trapezoidal dorsal portion is knitted with rows of dorsal stitches that are knitted back and forth, and the knitted trapezoidal plantar portion is knitted with rows of plantar stitches that are knitted back and forth. Advantageously, a row of stitches of the dorsal, respectively plantar, trapezoidal knitted part is knitted by forming a back and forth on a circular knitting machine. In particular, a portion knitted back and forth is also designated in the state of the art as being knitted back and forth, more particularly as opposed to a portion knitted in the round. A circular knitted section consists of rows of stitches that are knitted in the round continuously. Therefore, we always knit on the same side. As opposed to knitting back and forth, we knit the right side, for example, and then the wrong side in return. In an alternative embodiment, the knitted sock comprises a knitted tubular portion with rows of round knitted stitches arranged in the midfoot region of the knitted sock, in particular between the knitted trapezoidal dorsal and plantar portions on the one hand, and the heel region on the other hand. In an alternative embodiment, the knitted sock comprises a knitted tubular portion with rows of round knitted stitches arranged in the leg region. In an alternative embodiment, the knitted trapezoidal plantar part is folded, in the toe region of the sock, over the knitted trapezoidal dorsal part. Advantageously, the trapezoidal plantar part is knitted in continuity with the trapezoidal dorsal part, in particular the small base of the trapezium of said dorsal part is merged or consecutive with the small base of the trapezium of said trapezoidal plantar part. In an alternative embodiment, the knitted trapezoidal dorsal portion comprises an inner face and an outer face, and the knitted trapezoidal plantar portion comprises an inner face and an outer face, and the inner face of the knitted trapezoidal dorsal portion is arranged opposite the inner face of the knitted trapezoidal plantar portion. Preferably, the internal faces are oriented opposite the internal volume of the sock. Preferably, the outer faces are oriented towards the outside of the sock. In an alternative embodiment, the knitted trapezoidal plantar portion includes a toe end portion, or distal portion, and the knitted trapezoidal dorsal portion includes a toe end portion or distal portion, and the toe end portion or distal portion of the knitted trapezoidal plantar portion is knitted continuously with the toe end portion, or distal portion, of the knitted trapezoidal dorsal portion. In an alternative embodiment, the knitted trapezoidal plantar part and the knitted trapezoidal dorsal part together form a pocket, in particular of substantially trapezoidal shape, arranged to receive at least in part the toes of a foot, and at least in part the midfoot of the foot, optionally the entire midfoot. In an alternative embodiment, the knitted trapezoidal back portion comprises a distal portion and a proximal portion, and the number of stitches (as) in a row of stitches of the distal part is less than the number of stitches (b;) in a row of stitches of the proximal part, in particular the number a, is less than or equal to 0.50 * bu In an alternative embodiment, the knitted trapezoidal plantar part comprises a distal part and a proximal part, and the number of stitches (a,) in a row of stitches of the distal part is less than the number of stitches (b,) in a row of stitches of the proximal part, in particular the number a, is less than or equal to 0.50 * b, The numbers a, b, and b are determined according to the desired dimensions for the pocket receiving the toes and all or part of the midfoot. Advantageously, the reduction in the number of stitches from the row of stitches comprising a number by of stitches to reach a number of stitches a, in a given row of stitches is progressive, thus the number of stitches per row of stitches measured on two consecutive rows of stitches and going from the proximal part to the distal part of the knitted trapezoidal dorsal part decreases or stagnates but does not increase. Advantageously, the increase in the number of stitches from the row of stitches comprising a number a of stitches to reach a number of stitches b, in a given row of stitches is progressive, thus the number of stitches per row of stitches measured on two consecutive rows of stitches and going from the distal part to the proximal part of the knitted trapezoidal plantar part increases or stagnates but does not decrease. In an alternative embodiment, the number of stitches (k) of any row of stitches (n) knitted in the knitted trapezoidal back portion is greater than or equal to the number of stitches (p) in the row of stitches (n+2) knitted after the row of stitches (n) and in said knitted trapezoidal back portion, the numbers n, p and k being whole numbers and different from 0. Advantageously, the row of stitches (n+2) is knitted after the row of stitches n, the trapezoidal dorsal part being knitted from its proximal end / proximal part towards its distal end / distal part. In an alternative embodiment, the number of stitches (k') of any row of stitches (n°) knitted in the knitted trapezoidal plantar part is less than or equal to the number of stitches (p”) in the row of stitches (n'+2) knitted after the row of stitches (n) and in said knitted trapezoidal plantar part, the numbers n°, p° and k' being whole numbers and different from 0. Advantageously, the row of stitches (n'+2) is knitted after the row of stitches n', the trapezoidal plantar part being knitted from its distal end / distal part towards its proximal end / proximal part. In an alternative embodiment, the knitted trapezoidal dorsal part and the knitted trapezoidal plantar part are symmetrical along a transverse axis of symmetry (T1) passing between the distal end of the knitted trapezoidal dorsal part and the distal end of the knitted trapezoidal plantar part. Advantageously, the progression of the decrease in the number of knitted stitches from one row of stitches to another row of stitches in the knitted trapezoidal dorsal part is similar to the progression of the increase in the number of knitted stitches from one row of stitches to another row of stitches in the knitted trapezoidal plantar part. The transverse axis T1 extends from the medial side to the lateral side of the knitted sock, and is transverse to the longitudinal axis (L) of the knitted sock, possibly substantially perpendicular to said axis (L). In an alternative embodiment, at least one of the knitted medial and lateral bonding regions comprises a plurality of knitted through openings, preferably each of the knitted medial and lateral bonding regions comprises a plurality of knitted through openings. Advantageously, the periphery of each through opening comprises a portion of the knitted lateral edge, respectively medial, of the knitted trapezoidal dorsal part, and a portion of the knitted lateral edge, respectively medial, of the knitted trapezoidal plantar part, and possibly one or two knitted sections extending between the lateral edges, respectively medial, of the dorsal and plantar parts. Preferably, at least one dimension of at least one through opening, possibly of each of the through openings, is greater than or equal to 3 mm and less than or equal to 8 mm. The size of the openings is preferably measured on the foot when the knitted sock is slightly stretched. Advantageously, the through openings arranged on the medial and lateral sides of the knitted sock improve the mobility of the dorsal trapezoidal part relative to the plantar trapezoidal part. In an alternative embodiment, the knitted medial and lateral bonding regions do not include through openings. In an alternative embodiment, the medial edge, respectively lateral edge, of the knitted trapezoidal dorsal part is in direct contact with the medial edge, respectively lateral edge, of the knitted trapezoidal plantar part, in particular over all or part of the length of said edges. In particular, the medial and lateral joining regions do not in this case include through openings on the area or areas in which the medial or lateral edges are joined. In an alternative embodiment, the knitted sock includes a heel portion knitted trapezoidal lower part and a knitted trapezoidal upper heel part which are secured by knitted auxiliary medial and lateral securing regions. Advantageously, the trapezoidal lower and upper heel portions form a pocket receiving the heel. Preferably, said pocket receiving the heel has a general trapezoidal shape. In an alternative embodiment, the trapezoidal lower heel portion is knitted from the proximal end of the knitted trapezoidal plantar portion, in particular in continuity with the proximal end of the knitted trapezoidal plantar portion. In an alternative embodiment, the knitted sock comprises at least one portion knitted with rows of circular stitches, and said knitted portion extends into the midfoot region of the knitted sock. In particular, said portion knitted with rows of circular stitches is arranged between the toe region and the heel region. In an alternative embodiment, the knitted sock comprises at least one auxiliary, dorsal or plantar, knitted through opening having a knitted border, in particular extending into the midfoot region of the knitted sock. In particular, said auxiliary through opening has at least one dimension greater than or equal to 10 mm or 20 mm, in particular greater than or equal to 30 mm or 40 mm, in particular less than or equal to 60 mm. Said auxiliary through opening preferably has a rounded shape, in particular circular or elliptical. This auxiliary opening serves to improve the comfort, proprioception, and ventilation of the sock. In one embodiment, the auxiliary through opening comprises one or more rows of circular knitted stitches. Preferably, the knitted sock comprises an opening for introducing the foot into the foot receiving volume of the knitted sock which is different from the auxiliary through opening. In one embodiment, the auxiliary through opening is delimited by a circular knitted border. In one embodiment, the auxiliary through opening is arranged in a knitted tubular portion, said knitted tubular portion being arranged in the midfoot region, in particular the tubular portion comprises rows of circular stitches. In particular, said knitted tubular portion comprising rows of circular stitches culars is arranged between the knitted trapezoidal dorsal and plantar parts on the one hand and the heel region on the other. In an alternative embodiment, the knitted trapezoidal plantar and dorsal portions, and the knitted medial and lateral bonding regions, extend into the toe region, and into the midfoot region to the heel region. Advantageously, the entire foot, with the exception of the heel, is housed in the pocket formed by said knitted trapezoidal plantar and dorsal parts. This arrangement reinforces the advantages described above because they are found on the entire foot, that is to say from the end of the toes to the ankle: the sock fits the foot better and has better ergonomics, the main trapezoidal knitted pocket does not include or very little elastic thread(s), the sock is more easily recycled when it does not include elastic threads, this arrangement avoids the formation of folds and therefore does not generate or generates little friction with the foot (which prevents the formation of blisters in particular). In an alternative embodiment, the knitted trapezoidal plantar and dorsal parts comprise less than 10% by mass of one or more elastomeric yarn(s), optionally not comprising any elastomeric yarn(s). Advantageously, it is not necessary to use an elastomeric yarn for the sock to fit perfectly to the shape of the foot thanks to the extended trapezoidal dorsal and plantar parts covering a large part of the foot. In this text, an elastomeric thread is understood to mean any thread comprising a natural elastomeric material (for example rubber) or synthetic material (for example polyurethane, spandex or lycra type). The subject of the present invention, according to a second aspect, is a method of knitting a knitted sock, in particular for practicing a sport, comprising a toe region, a midfoot region, and a heel region, and possibly a leg region, in particular according to any one of the variant embodiments with reference to the first aspect of the invention, said method advantageously comprises: - a knitting step (B) of a trapezoidal dorsal or plantar part by progressively reducing the number of stitches knitted per row of stitches; in particular by reducing, at least every two rows of stitches, the number of stitches knitted per row of stitches; - a knitting step (C) of a trapezoidal plantar or dorsal part from the distal end of the knitted trapezoidal dorsal or medial part by progressively increasing the number of stitches knitted per row of stitches; in particular by increasing, at least every two rows of stitches, the number of stitches knitted per row of stitches; - a knitting step (D) of a lateral joining region and a medial joining region which join the knitted trapezoidal dorsal and plantar parts along their respective lateral and medial edges, the knitting of said lateral and medial joining regions being carried out progressively during the knitting step (C); - the knitted trapezoidal dorsal and plantar portions, and said knitted medial and lateral bonding regions, are knitted so as to extend into the toe region and at least partly into the midfoot region of the knitted sock; and - said method further comprises a step (A) of knitting an opening opening into the volume for receiving the foot of the sock. In one embodiment, the knitting step (A) is a step of knitting a foot insertion opening into the foot receiving volume of the knitted sock, and the step (A) takes place before the step (B). In one embodiment, the knitting step (A) is a step of knitting an auxiliary through opening, in particular as described below, and the knitting step (A) is carried out before the knitting step (B) of a knitted trapezoidal dorsal, or plantar, part or after step (D). Preferably, step (C) takes place after step (B). Preferably, by progressively increasing or decreasing the number of stitches, it is understood that the number of stitches from one row of stitches to the next row of stitches increases, decreases, or is equal. In particular, the number of rows of stitches over which the increases / decreases in stitches are distributed is determined according to the desired shape of the dorsal or plantar trapezius. Preferably, during the knitting step (D), the lateral and medial joining regions are knitted as the trapezoidal plantar (or dorsal) part is knitted, the lateral edge of which is connected by knitting to the lateral edge of the trapezoidal dorsal (or plantar) part and the medial edge of which is connected by knitting to the medial edge of said trapezoidal dorsal (or plantar) part. Preferably, the knitting process is carried out on a circular knitting machine, for example a knitting machine manufactured by the company Lonati, having the reference 616 DF3. In one embodiment, the opening opening into the volume for receiving the foot of the sock is the opening for introducing the foot into the volume for receiving the sock, in particular this opening for introducing the foot comprises / is formed by rows of circularly knitted stitches. In another embodiment, the opening opening into the volume of receiving the foot of the sock is an auxiliary through opening, in particular this auxiliary through opening comprises / is formed by rows of circular knitted stitches. Preferably, in this case, the method further comprises a step of knitting an opening for introducing the foot into the volume for receiving the foot of the sock, still preferably said introduction opening comprises / is formed by rows of circularly knitted stitches. In an alternative embodiment, the knitting step (A) of an opening opening into the foot receiving volume is carried out before the knitting step (B). Advantageously, the opening is an opening for introducing the foot into the interior volume of the sock. In an alternative embodiment, the trapezoidal back portion is knitted with rows of back stitches knitted back and forth. In an alternative embodiment, the trapezoidal plantar part is knitted with rows of plantar stitches knitted back and forth. Advantageously, it is understood that the trapezoidal dorsal, or plantar, part is knitted on a circular needle bed by making a back and forth for two rows of stitches, which can also be designated in the state of the art by knitted from front to back. Thus, the knitting of the needles back and forth is not carried out by following the entire circumference of the circular needle bed but by knitting on only a part of the needles of the circular needle bed. In an alternative embodiment, the knitting step (A) is a step of circular knitting of an opening for introducing the foot into the internal volume for receiving the foot of the knitted sock. In an alternative embodiment, the knitting step (A) is a step of knitting, in particular circular, an auxiliary through opening, plantar or dorsal, and opening into the internal volume for receiving the foot of the knitted sock, said auxiliary through opening extends into the midfoot region of the knitted sock. Preferably, the knitting step (A) of the auxiliary through opening is carried out before the knitting step (B) or after the knitting step (D). In particular, the knitting step (A) comprises knitting a knitted border around the perimeter of the auxiliary through opening, in particular said knitted border is closed on itself and / or has a substantially rounded shape. Dorsal auxiliary opening means that the knitted sock includes an auxiliary opening facing the back / top of the foot, and plantar auxiliary opening means that the knitted sock includes an auxiliary opening facing the sole / bottom of the foot. In a sub-variant embodiment, said method further comprises a step of circular knitting (E) of an opening for introducing the foot into the internal volume for receiving the foot of the knitted sock. Advantageously, the foot introduction opening is different from the auxiliary plantar or dorsal through opening. Preferably, the knitting step (E) is carried out after the knitting step (A), in particular after the step (D), in particular after the knitting step of the heel pocket and / or after the knitting step (F) of the tubular midfoot or leg portion. In one embodiment, the knitting step (E) is performed before the knitting step (A), and before the knitting step (B). Preferably, in this case, we start by knitting the opening for the introduction of the foot and finish by knitting the auxiliary through opening. In an alternative embodiment, said method comprises a step of circular knitting (F) of a tubular portion comprising rows of circular knitted stitches arranged in the midfoot region or in the leg region. The tubular portion may be arranged between the trapezoidal dorsal and plantar portions and the heel region of the sock, particularly in the midfoot region. The tubular portion may be arranged between the opening for introducing the foot into the inner volume of the sock and the heel region, in particular in the leg region. In an alternative embodiment, the knitting method comprises, in particular in this order: - a step of circular knitting (A) of a portion (p;n) comprising rows of circular knitted stitches to form an opening for introducing the foot into the volume for receiving the foot of the knitted sock; in particular step (A) corresponds to step (E) defined above. - optionally a step of circular knitting (F) a tubular portion (p;) comprising rows of circular knitted stitches to form a leg portion extending into the leg region of the knitted sock; - especially : - each of the rows of stitches of the tubular portion is obtained by knitting stitches on the circular needle bed of the circular knitting machine; and / or - the height of the tubular portion (p;) is determined by the number of rows of knitted stitches; - optionally a step of putting part of the meshes of the tubular portion (p;) on hold, or of the tubular portion (p;.), In particular on a part of the needles of the circular needle bed of the knitting machine. - a knitting step (B) of a trapezoidal dorsal or plantar part by progressively reducing the number of stitches knitted per row of stitches; - in particular: - the rows of stitches of the trapezoidal dorsal, or plantar, part are knitted from front to back (or that is to say by forming back and forth movements on a part of the needles of the circular needle bed of the knitting machine); and / or - this knitting step (B) comprises the knitting of a part of the stitches of the tubular portion (p;) or (p;.), in particular arranged on the circular needle bed of the knitting machine. - a knitting step (C) of a trapezoidal plantar or dorsal part from the distal end of the knitted trapezoidal dorsal or plantar part by progressively increasing the number of stitches knitted per row of stitches; - in particular the rows of stitches of the trapezoidal plantar or dorsal part are knitted from front to back (or that is to say by forming back and forth movements on the circular needle bed of the knitting machine). - a knitting step (D) of a lateral joining region and a medial joining region which join the knitted trapezoidal dorsal and plantar parts along their respective lateral and medial edges, the knitting of said lateral and medial joining regions being carried out progressively during the knitting step of the trapezoidal plantar, or dorsal, part (C). - the knitted trapezoidal dorsal and plantar parts, and said knitted medial and lateral joining regions, are knitted so as to extend into the toe region and at least partly into the midfoot region of the knitted sock or into the midfoot region up to the border of the heel region. - optionally a knitting step (G) of a trapezoidal lower heel part by progressively decreasing the number of knitted stitches per row of stitches, in particular: - from the proximal end of the knitted trapezoidal plantar part, and / or - the rows of stitches of the trapezoidal lower heel part are knitted from front to back (or i.e. by forming back and forth movements on the circular needle bed of the knitting machine), and / or - the trapezoidal lower heel portion is knitted from a first end to a second end, the first end of the trapezoidal lower heel portion being adjacent to the proximal end of the knitted trapezoidal plantar portion. - optionally a step of knitting (H) a trapezoidal upper heel portion by progressively increasing the number of stitches knitted per row of mesh; - especially : - from the second end of the knitted trapezoidal lower heel portion, and / or - the rows of stitches of the trapezoidal upper heel part are knitted from front to back (or that is, by forming back and forth movements on the circular needle bed of the knitting machine). - optionally a knitting step (I) of an additional lateral joining region and an additional medial joining region which join the knitted trapezoidal upper and lower heel parts along their respective lateral and medial edges, the knitting of said additional lateral and medial joining regions being carried out progressively during the knitting step of the trapezoidal upper heel part (H). - optionally a step of closing the knitted sock by knitting stitches in continuity with the trapezoidal upper heel part with the stitches waiting for the tubular portion (p;) or (pi). Preferably, this variant corresponds to a knitted sock in which the medial and lateral bonding regions extend into the toe region, and into the midfoot region up to the border of the heel region. The knitted sock may include a knitted or unknitted leg portion, the height of which varies depending on the final function of the sock. In an alternative embodiment, the knitting method comprises, in particular in this order: - a step of circular knitting (A) of a portion (p;n) comprising rows of circular knitted stitches to form an opening for introducing the foot into the volume for receiving the foot of the knitted sock; in particular step (A) corresponds to step (E) defined above. - optionally a step of circular knitting (F) a tubular portion (p;) comprising rows of circular knitted stitches to form a leg portion extending into the leg region of the knitted sock; - especially : - each of the rows of stitches of the tubular portion is obtained by knitting stitches on the circular needle bed of the circular knitting machine; and / or - the height of the tubular portion (p;) is determined by the number of rows of knitted stitches. - a step of putting part of the meshes of the tubular portion (p;) on hold, or of the tubular portion (pi), in particular on part of the needles of the circular needle bed of the loom to knit. - a step of knitting (G) a trapezoidal upper heel part by progressively reducing the number of stitches knitted per row of stitches, in particular from a part of the stitches of the portion (p;) or (p;.), in particular not left on hold, - especially : - the rows of stitches of the trapezoidal upper heel part are knitted from front to back (or i.e. by forming back and forth movements on the circular needle bed of the knitting machine), and / or - the trapezoidal upper heel portion is knitted from a first end to a second end. - a knitting step (H) of a trapezoidal lower heel part by gradually increasing the number of stitches knitted per row of stitches, - in particular: - the trapezoidal lower heel portion is knitted from a first end to a second end, the first end of the knitted trapezoidal lower heel portion being adjacent to the second end of the trapezoidal upper heel portion, and / or - from the second end of the knitted trapezoidal upper heel portion, and / or - the rows of stitches of the trapezoidal lower heel part are knitted from front to back (or that is, by forming back and forth movements on the circular needle bed of the knitting machine). - a knitting step (I) of an additional lateral joining region and an additional medial joining region which join the knitted trapezoidal upper and lower heel parts along their respective lateral and medial edges, the knitting of said additional lateral and medial joining regions being carried out progressively during the knitting step of the trapezoidal lower heel part (H). - a step of knitting a tubular portion (Pp) comprising rows of circular stitches extending in the midfoot region; - in particular by knitting all or part of the stitches of the knitted trapezoidal lower heel part and all or part of the stitches waiting for the tubular portion (p;) or (Pin)- - a knitting step (B) of a trapezoidal dorsal or plantar part by progressively reducing the number of stitches knitted per row of stitches; - in particular: - the rows of stitches of the dorsal, or plantar, trapezoidal part are knitted from front to back (or i.e. by forming back and forth movements on a part of the needles of the circular needle bed of the knitting machine); and / or - this knitting step (B) comprises knitting a part of the stitches of the tubular portion (p,5), in particular arranged on the circular needle bed, in particular a part of the stitches of the portion (pp) Are put on hold. - a knitting step (C) of a plantar, or dorsal, trapezoidal part from the distal end of the knitted dorsal, or plantar, trapezoidal part by progressively increasing the number of stitches knitted per row of stitches; - in particular the rows of stitches of the plantar, or dorsal, trapezoidal part are knitted from front to back (or i.e. by forming back and forth movements on the circular needle bed of the knitting machine). - a knitting step (D) of a lateral joining region and a medial joining region which join the knitted trapezoidal dorsal and plantar parts along their respective lateral and medial edges, the knitting of said lateral and medial joining regions being carried out progressively during the knitting step of the trapezoidal plantar, or dorsal, part (C); - the knitted trapezoidal dorsal and plantar parts, and said knitted medial and lateral joining regions, are knitted so as to extend into the toe region and at least partly into the midfoot region of the knitted sock; - optionally a step of closing the knitted sock by knitting stitches in the continuity of the plantar part, respectively dorsal, trapezoidal knitted with the stitches waiting for the tubular portion (Ppmp)- This variant advantageously corresponds to a knitted sock in which the medial and lateral bonding regions extend into the toe region, and into the midfoot region. In another embodiment, the knitting method comprises, in particular in this order: - a knitting step (A), in particular circular, of an auxiliary through opening intended to open into the volume for receiving the foot of the knitted sock. - a knitting step (B) of a trapezoidal dorsal, or plantar, part by progressively reducing the number of stitches knitted per row of stitches; - in particular the rows of stitches of the dorsal, or plantar, trapezoidal part are knitted from front to back (or that is to say by forming back and forth movements on the bed of circular needles of the knitting machine). - the knitting step (A) is carried out before the knitting step (B) or after the knitting step (D) below. - a knitting step (C) of a trapezoidal plantar or dorsal part from the distal end of the dorsal, or plantar, trapezoidal part knitted by gradually increasing the number of stitches knitted per row of stitches; - in particular the rows of stitches of the plantar trapezoidal part are knitted from front to back (or that is to say by forming back and forth movements on the bed of circular needles of the knitting machine). - a knitting step (D) of a lateral joining region and a medial joining region which join the knitted trapezoidal dorsal and plantar parts along their respective lateral and medial edges, the knitting of said lateral and medial joining regions being carried out progressively during the knitting step of the trapezoidal plantar or dorsal part (C); - the knitted trapezoidal dorsal and plantar portions, and said knitted medial and lateral joining regions, are knitted so as to extend into the toe region and at least partly into the midfoot region of the knitted sock. - optionally a step of circular knitting (F) of a tubular portion (pnp) comprising rows of circular knitted stitches to form a midfoot portion extending into the midfoot region of the knitted sock; - in particular each of the rows of stitches of the tubular portion (Pnp) is obtained by knitting stitches on the bed of circular needles; and / or the length of the tubular portion (Pnp) is determined by the number of rows of knitted stitches. - optionally a step of putting part of the meshes of the tubular portion (p.np) on hold 3 - particularly on the needle bed of the circular knitting machine. - a knitting step (G) of a trapezoidal lower heel part by progressively reducing the number of stitches knitted per row of stitches; - in particular: - from the proximal end of the knitted trapezoidal plantar part, and / or - from a part of the stitches of the tubular portion (pp), in particular arranged on the bed of circular needles of the knitting machine, and / or - the rows of stitches of the trapezoidal lower heel part are knitted from front to back (or i.e. by forming back and forth movements on the circular needle bed of the knitting machine), and / or - the trapezoidal lower heel portion is knitted from a first end to a second end, the first end of the trapezoidal lower heel portion being adjacent to the proximal end of the knitted trapezoidal plantar portion or of a part of the stitches of the tubular portion (pp)- - a knitting step (H) of a trapezoidal upper heel part by gradually increasing the number of stitches knitted per row of stitches; - especially : - from the second end of the knitted trapezoidal lower heel portion, and / or - the rows of stitches of the trapezoidal upper heel part are knitted from front to back (or that is, by forming back and forth movements on the second needle bed of the knitting machine). - a knitting step (I) of an additional lateral joining region and an additional medial joining region which join the knitted trapezoidal upper and lower heel parts along their respective lateral and medial edges, the knitting of said additional lateral and medial joining regions being carried out progressively during the knitting step of the trapezoidal upper heel part (H). - optionally a step of closing the knitted sock by knitting stitches in continuity with the trapezoidal upper heel portion with the stitches waiting for the tubular portion (Pnp) OR the stitches of the trapezoidal back portion. - optionally a step of circular knitting (F) of a tubular portion (p;) comprising rows of circular knitted stitches to form a leg portion extending into the leg region of the knitted sock. - a circular knitting step (E) of an opening for introducing the foot into the volume for receiving the foot of the knitted sock. In an alternative embodiment, the knitting method comprises, in particular in this order: - a step of circular knitting (A) of a portion (p;n) comprising rows of circular knitted stitches to form an opening for introducing the foot into the volume for receiving the foot of the knitted sock; in particular step (A) corresponds to step (E) defined above. - optionally a step of circular knitting (F) a tubular portion (p;) comprising rows of circular knitted stitches to form a leg portion extending into the leg region of the knitted sock; - especially : - each of the rows of stitches of the tubular portion is obtained by knitting stitches on the circular needle bed of the circular knitting machine, and / or - the height of the tubular portion (p;) is determined by the number of rows of knitted stitches. - optionally a step of putting part of the meshes of the tubular portion (p;) on hold, or of the tubular portion (p;.), in particular on part of the needles of the circular needle bed of the knitting machine. - a knitting step (H) of a trapezoidal upper heel part by progressively reducing the number of stitches knitted per row of stitches; - in particular: - from a part of the meshes of the tubular portion (p;), or of the tubular portion (Pin), and / or - the rows of stitches of the trapezoidal upper heel part are knitted from front to back (or i.e. by forming back and forth movements on the circular needle bed of the knitting machine), and / or - the trapezoidal upper heel portion is knitted from a first end to a second end, the first end of the trapezoidal upper heel portion being adjacent to a portion of the stitches of the tubular portion (p;), or of the tubular portion (pin). - a knitting step (G) of a trapezoidal lower heel part by gradually increasing the number of stitches knitted per row of stitches; - especially : - from the second end of the trapezoidal upper heel portion, and / or - the rows of stitches of the trapezoidal lower heel part are knitted from front to back (or i.e. by forming back and forth movements on the circular needle bed of the knitting machine), and / or - the trapezoidal lower heel portion is knitted from a first end to a second end, the first end of the trapezoidal lower heel portion being adjacent to the second end of the trapezoidal upper heel portion. - a knitting step (I) of an additional lateral joining region and an additional medial joining region which join the knitted upper and lower trapezoidal heel parts along their respective lateral and medial edges, the knitting of said additional lateral and medial joining regions being carried out progressively during the knitting step of the lower trapezoidal heel part (G). - optionally a step of circular knitting (F) a tubular portion (pp) comprising rows of circular knitted stitches to form a midfoot portion extending into the midfoot region of the knitted sock; - especially : - the tubular portion (Pprp) is obtained by knitting all or part of the stitches placed on hold in the tubular portion (p;), or in the tubular portion (pis), and all or part of the stitches in the trapezoidal lower heel part, and / or - the length of the tubular portion (Pp) is determined by the number of rows of knitted stitches. - a knitting step (C) of a trapezoidal plantar or dorsal part from the trapezoidal lower heel part knitted by gradually decreasing the number of stitches knitted per row of stitches; - especially : - the rows of stitches of the trapezoidal plantar part are knitted from front to back (or that is, by forming back and forth movements on the circular needle bed of the knitting machine). - a knitting step (B) of a trapezoidal dorsal or plantar part by progressively increasing the number of stitches knitted per row of stitches; - in particular: - the rows of stitches of the dorsal, or plantar, trapezoidal part are knitted from front to back (or that is to say by forming back and forth movements on the bed of circular needles of the knitting machine). - a knitting step (D) of a lateral joining region and a medial joining region which join the knitted trapezoidal dorsal and plantar parts along their respective lateral and medial edges, the knitting of said lateral and medial joining regions being carried out progressively during the knitting step of the trapezoidal plantar or dorsal part (C); - the knitted trapezoidal dorsal and plantar parts, and said knitted medial and lateral joining regions, are knitted so as to extend into the toe region and at least partly into the midfoot region of the knitted sock. - a knitting step (A), in particular circular, of an auxiliary through opening, carried out after step (D). The invention relates, according to a third aspect, to a shoe upper comprising the knitted sock according to any one of the variants and / or embodiments according to a first aspect of the invention, and / or comprising a knitted sock obtained by the knitting method according to the second aspect of the invention. Advantageously, said upper comprises at least one sock comprising one or more at least partly heat-melted yarn(s), in particular the knitted trapezoidal dorsal part and / or the knitted trapezoidal plantar part and / or the heel pocket each comprises one or more heat-melted yarn(s). Said thermofused wire(s) is / are one or more thermofusible wire(s) at least partly having undergone a thermoforming or thermocompression process for shaping and possibly molding the rod. The invention also relates, according to a fourth aspect, to an article of footwear comprising a sole and a shoe upper according to a third aspect of the invention. Description of the drawings The present invention will be better understood by reading the following embodiments according to the invention, cited without limitation, and illustrated by the figures in which: [Fig.1] [Fig.1] schematically represents, seen from above, a first example of a knitted sock according to the invention: [Fig.2] [Fig.2] schematically represents, seen from the medial side, and substantially flat, the knitted sock of [Fig.1]; [Fig.3] [Fig.3] schematically represents, seen from the medial side, the knitted sock of figures 1 and 2 placed on a preform in the shape of a foot; [Fig.4] [Fig.4] schematically represents the knitting diagram of the trapezoidal plantar and dorsal parts and the trapezoidal upper and lower heel parts of the sock shown in Figures 1 to 3; [Fig.5] [Fig.5] schematically represents, seen from the lateral side, a second example of a knitted sock according to the invention arranged on a preform in the shape of a foot; [Fig.6] [Fig.6] schematically represents, seen from the lateral side, and substantially flat, the knitted sock shown in [Fig.5]; [Fig.7] [Fig.7] schematically represents, seen from the medial side, and substantially flat, a third example of a knitted sock according to the invention; [Fig.8] [Fig.8] schematically represents, seen from above, and substantially flat, the knitted sock of [Fig.7]; [Fig.9] [Fig.9] schematically represents, seen from the medial side, the knitted sock of figures 7 and 8 arranged on a preform in the shape of a foot; [Fig.10] [Fig.10] schematically represents, in rear view, the knitted sock of figures 7 to 9 arranged on a preform in the shape of a foot; [Fig.11] [Fig.11] schematically represents the knitting diagram of the trapezoidal plantar and dorsal parts of the sock shown in Figures 7 to 10; [Fig.12] [Fig.12] schematically represents a fourth example of a knitted sock according to the invention, seen from the medial side and arranged on a preform in the shape of a foot; [Fig.13] [Fig.13] schematically represents a variant of a knitted medial joining region of a fifth example of a knitted sock according to the invention: [Fig.14] [Fig.14] schematically represents the knitting diagram of the trapezoidal plantar and dorsal parts of the knitted sock. Description of the embodiments The first example of a knitted sock 1 shown in Figures 1 to 3 comprises a toe region 5, a midfoot region 10, and a heel region 15. This knitted sock 1 comprises a knitted trapezoidal dorsal portion 20 and a knitted trapezoidal plantar portion 30 which are secured by knitted medial 40 and lateral 50 securing regions. The knitted trapezoidal plantar and dorsal portions 20, 30, and the knitted medial and lateral securing regions 40, 50, extend into the toe region 5 and at least partly into the midfoot region 10, in particular into the midfoot region 10 up to the heel region 15. The knitted trapezoidal dorsal portion 20 comprises a medial edge 21 and a lateral edge 22 and the knitted trapezoidal plantar portion 30 comprises a medial edge 31 and a lateral edge 32 (c. Figures 3 and 4). The knitted trapezoidal dorsal and plantar portions 20, 30 are secured by medial and lateral knitted securing regions 40, 50, in particular the lateral edge 22 is secured by knitting with the lateral edge 32 along a knitting line (not visible in the figures), and the medial edge 21 is secured by knitting with the medial edge 31 along a knitting line 41. The knitting line 41 (or gore line in English) advantageously comprises through openings 42 whose size varies depending on the tension exerted on the knitted binding thread(s) 45 extending between the dorsal and plantar portions 20, 30 and the types of stitches used for the knitted securing. The knitting line 41 or medial bonding region 40 extends from the toe region 5, through the midfoot region 15 and to the heel region 15 over a length L,. The sock | has a length Lp between its front edge and its rear edge. As seen in [Fig.2], L; is greater than or equal to Ly * 0.5, in particular greater than or equal to Ly * 0.6. The sock 1] also includes an opening for introducing the foot 60 opening into the volume for receiving the foot 70. The sock 1 comprises, in the heel region 15, a knitted trapezoidal lower heel portion 80 and a knitted trapezoidal upper heel portion 90 which are joined by knitted auxiliary medial 100 and lateral (not visible in the figures) joining regions. The trapezoidal lower heel portion 80 comprises a medial edge 81 and a lateral edge 82, and the trapezoidal upper heel portion 90 comprises a medial edge 91 and a lateral edge 92. The lateral edges 82 and 92 are joined by knitting along a knitted line arranged on the lateral side of the sock 1, and the medial edges 81 and 91 are joined by knitting along a knitted line arranged on the medial side of the sock 1. The sock 1 may comprise anterior 2 and posterior 4 gripping tabs which are knitted and in knitted connection with the opening for introducing the knitted foot 60. Advantageously, the knitted trapezoidal plantar part 30 is folded, from the toe region 5, onto the knitted trapezoidal dorsal part 20. Advantageously, the knitted trapezoidal plantar portion 30 comprises a toe end portion 35 knitted continuously with the toe end portion 25 of the knitted trapezoidal dorsal portion 20. Advantageously, the knitted trapezoidal plantar portion 30 and the knitted trapezoidal dorsal portion 20 together form a pocket 110 arranged to receive the toes of a foot and the midfoot of the foot, and having substantially a general trapezoidal shape. The knitted trapezoidal dorsal portion 20 extends between a proximal end 26 passing through a large base, and a distal end 28 passing through a small base. The small and large bases are connected by the medial 21 and lateral 22 edges converging towards the distal end 28 (see [Fig.4]). The shape of the trapezoidal plantar portion 30 is reversed with respect to the dorsal trapezoidal portion 20. The knitted trapezoidal plantar portion 30 extends between a proximal end 36 passing through a large base, and a distal end 38 passing through a small base. The small and large bases are connected by the medial 31 and lateral 32 edges converging towards the distal end 38. Advantageously, the trapezoidal plantar part 30 and the trapezoidal dorsal part 20 are symmetrical to each other along a transverse axis of symmetry T1 passing between the distal end 28 of the knitted trapezoidal dorsal part 20 and the distal end 38 of the knitted trapezoidal plantar part 30, preferably the axis T1 is intersecting with the longitudinal axis L of the sock |. Preferably, the rows of stitches of the dorsal and plantar parts 20, 30, as well as the upper and lower heel parts 80, 90, extend along the X axis, and the columns of stitches of the dorsal and plantar parts 20, 30, as well as the upper and lower heel parts 80, 90, extend along the Y axis, the X and Y axes being substantially perpendicular. Preferably, the knitted sock | is obtained by a knitting process comprising the following steps, in particular carried out in this order, on a circular knitting machine comprising a circular needle bed: - a step of circular knitting (A) of a portion (pin) comprising rows of circular knitted stitches to form the opening for introducing the foot 60 into the volume for receiving the foot of the knitted sock 1; - optionally the knitting of the front tab 2 and / or the rear tab 3, in particular carried out during the circular knitting step (A); - a step of putting part of the meshes of the tubular portion (pin) on hold, in particular on the needle bed of the circular knitting machine; - a knitting step (B) of the trapezoidal dorsal part 20, in particular in the direction of the arrow F1, by progressively reducing the number of stitches knitted per row of stitches, in particular every two rows of stitches. For example, a row of stitches at the proximal end 26 comprises between 80 and 150 stitches, and a row of stitches at the distal end 28 comprises between 30 and 60 stitches. Advantageously, the rows of stitches of the trapezoidal dorsal part 20 are knitted from front to back, or that is to say by forming back and forth movements on the needle bed of the knitting machine. A row of stitches is for example knitted from a medial edge 21 to a lateral edge 22 then the following row of stitches is knitted back from said lateral edge 22 to said medial edge 21. The knitting continues in this way up to the desired length of the dorsal part 20 and according to the decrease in the number of stitches applied from row to row. The knitting step (B) comprises knitting the back portion 20 in the continuity of a portion of the stitches of the tubular portion (pin), in particular arranged on the needle bed of the circular knitting machine, that is to say stitches which are not waiting on the needle bed. - a step of knitting (C) a trapezoidal plantar part 30 from the distal end 28 of the knitted trapezoidal dorsal part 30 by progressively increasing the number of stitches knitted per row of stitches, in particular every two rows of stitches. In particular, the rows of stitches of the trapezoidal plantar part 30 are knitted from front to back, that is to say by forming back and forth movements on the needle bed of the knitting machine. A row of stitches is for example knitted from a medial edge 31 to a lateral edge 32 then the following row of stitches is knitted back from said lateral edge 32 towards said medial edge 31. The knitting continues in this way up to the desired length of the plantar part 30 and according to the decrease in the number of stitches applied from row to row.Advantageously, the number of stitches in the rows of stitches at the proximal ends 26 and 36 are similar, and the number of stitches in the rows of stitches at the distal ends 28 and 38 are also similar. Preferably, the progression of the increase in the number of stitches per row for the plantar portion 30 is carried out so as to form a knitted trapezoidal plantar portion symmetrical to the dorsal portion 20, so as to fold perfectly against the latter. - a knitting step (D) of a lateral joining region 50 and a medial joining region 40 which join the dorsal 20 and plantar 30 trapezoidal parts knitted according to their respective lateral 22, 32 and medial 21, 31 edges, the knitting of said lateral 50 and medial 40 joining regions being carried out pro- progressively during the knitting step (C) of the trapezoidal plantar part 30. Advantageously, at the end of each row of stitches of the plantar part 30, the edge of the plantar part 30 is knitted or not knitted with the corresponding edge of the dorsal part 20. The stitch pattern of the lateral 50 and medial 40 joining regions makes it possible to define the number of through openings 42, their sizes, and their distribution in the different regions 5, 10, 15 of the sock 1. The knitted trapezoidal dorsal 20 and plantar 30 parts, and said knitted medial 40 and lateral 50 joining regions, are knitted so as to extend into the toe region 5 and into the midfoot region 10 of the knitted sock 1 as far as the heel region 15. - a step of knitting (G) a trapezoidal lower heel part 80, in particular from at least a part of the stitches of the proximal end 36 of the knitted trapezoidal plantar part 30, by progressively increasing the number of knitted stitches per row of stitches. In particular, the rows of stitches of the trapezoidal lower heel portion 80 are knitted from front to back, that is to say by forming back and forth movements on the needle bed of the knitting machine between the medial 81 and lateral 82 edges. Preferably, the trapezoidal lower heel portion 80 is knitted from a first end 83 to a second end 84, the first end 83 of the trapezoidal lower heel portion 80 being in this specific example adjacent to the proximal end 36 of the knitted trapezoidal plantar portion 30. - a step (H) of knitting a trapezoidal upper heel portion 90, in particular from the second end 84 of the knitted trapezoidal lower heel portion 80, by progressively increasing the number of stitches knitted per row of stitches. The rows of stitches of the trapezoidal upper heel portion 90 are also knitted from front to back, that is to say by forming back and forth movements on the needle bed of the knitting machine between its medial edge 91 and its lateral edge 92. - a knitting step (I) of an additional lateral joining region (not visible in the figures) and an additional medial joining region 100 which join the knitted trapezoidal upper and lower heel parts 80, 90 along their respective lateral edges 82, 92) and medial edges 81, 91, the knitting of said additional lateral and medial joining regions 100 being carried out progressively during the knitting step of the trapezoidal upper heel part (H). In a similar manner to the knitting of the joining regions 40, 50 for the dorsal and plantar parts 20, 30, at the end of each row of knitted stitches of the upper heel part, the edge of the latter is knitted or not with the corresponding edge of the lower heel part. - a step of closing the knitted sock by knitting stitches in the continuity of the trapezoidal upper heel part 90 with all or part of the stitches remaining pending the tubular portion (pin). Advantageously, the knitted trapezoidal dorsal portion 20 comprises a distal portion 28a and a proximal portion 26a (see [Fig.4]), and the number of stitches (a;) in a row of stitches of the distal portion 28a is less than the number of stitches (be) in a row of stitches of the proximal portion 26a, in particular the number a, is less than or equal to 0.50 * be. For example, ayva from 40 to 60 stitches per row of stitches, and b; goes from 120 to 150 stitches per row of stitches. Similarly, the knitted trapezoidal plantar portion 30 comprises a distal portion 38a and a proximal portion 36a, and the number of stitches (a,) in a row of stitches of the distal portion 38a is less than the number of stitches (b,) in a row of stitches of the proximal portion 36a, in particular the number a, is less than or equal to 0.50 * b,. For example, a, ranges from 40 to 60 stitches per row of stitches, and b, ranges from 120 to 150 stitches per row of stitches. Advantageously, the number of stitches (k) of any row of stitches (n) knitted in the knitted trapezoidal back portion 20 is greater than or equal to the number of stitches (p) in the row of stitches (n+2) knitted after the row of stitches (n) in the knitting direction according to arrow F1, the numbers n, p and k being whole numbers and different from 0. The sock 1 obtained thus comprises a pocket 110 having a substantially trapezoidal shape and extending in the toe 5 and midfoot 10 regions to the start of the heel region 15. This arrangement makes it possible to obtain a sock that fits the foot without the formation of folds that could generate friction. In addition, the trapezoidal dorsal part 20 is free to move over the top of the foot, without systematically driving the trapezoidal plantar part 30, which improves comfort by avoiding the formation of folds and allows the sock to fit the foot despite the movements of the foot, in particular when practicing a sporting activity. Advantageously, the shape of the trapezoidal pocket 110 receiving the toes and the midfoot makes it possible not to use elastomeric thread(s) in the knitted trapezoidal dorsal and plantar parts (20, 30). This arrangement makes it possible to limit the number of different materials in the sock 1. The sock 1] thus comprises textile materials which are more compatible with each other if they have to be further processed, which facilitates the recycling of the sock. Figures 5 and 6 show a second example of a knitted sock 200 according to the invention which is similar to the sock 1 except that the knitted sock 200 comprises a leg portion (pj) knitted after the opening for introducing the foot 260 in the sock reception volume 200. The knitted sock 200 also includes a knitted trapezoidal back portion 220 and a knitted trapezoidal plantar portion 230 knitted together along their respective medial and lateral edges in medial and lateral joining zones, and trapezoidal lower 280 and upper 290 heel portions knitted together along their respective medial and lateral edges in additional medial and lateral joining zones. The knitting method of the sock 200 is similar to the knitting method of the sock 1 except that after the knitting step (A), the tubular portion (p;) is knitted circularly with rows of circular stitches, and the stitches put on hold are not a part of the stitches of the foot introduction tubular portion (p;.) but a part of the stitches of the leg tubular portion (p;) in the ankle region 217. In [Fig.5], it is observed that the through openings 242 are visible along the medial and lateral securing regions because the latter are slightly tensioned on the foot-shaped preform. These openings 242 facilitate the evacuation of heat and perspiration, which improves comfort. The third example of a knitted sock 300 shown in Figures 7 to 11 comprises a knitted trapezoidal dorsal portion 320 and a knitted trapezoidal plantar portion 330 whose respective medial 321, 331 and lateral 322, 332 edges are joined by knitting in medial 340 and lateral 350 joining regions. The sock 300 comprises an opening for introducing the foot 360 into the receiving volume of said sock 300, and a leg portion (p;) 370. The sock 300 also comprises an auxiliary through opening 375 which is in this specific example a dorsal auxiliary through opening, and is arranged at least partly in the trapezoidal dorsal part 320. In this example, the auxiliary through opening 375 opens into the foot receiving volume of the sock 300 and is delimited by a circular knitted border 376. The auxiliary through opening 375 is in this example substantially rounded and has a width extending between the medial and lateral edges of the order of 40 mm to 50 mm for example. The dorsal and plantar portions 320, 330 as well as the medial 340 and lateral 350 securing regions extend into the toe region 305 and partly into the midfoot region 310. The sock 300 comprises a tubular portion 378 (Ppnp) comprising rows of circular stitches, and arranged in the midfoot region 310 between the trapezoidal knitted pocket formed by the dorsal and plantar portions 320, 330 and the heel region 315. Advantageously, in addition to the advantages mentioned above concerning the trapezoidal pocket for receiving the toes and partly the midfoot region, the opening Auxiliary crossing 375 improves the evacuation of heat and perspiration, and improves proprioception when practicing certain sporting activities (dance, fitness, etc.). Preferably, the knitted sock 300 is obtained by a knitting process comprising the following steps, in particular carried out in this order, on a circular knitting machine, in particular comprising a circular needle bed: - a knitting step (A), in particular circular, of the auxiliary through opening 375 intended to open into the volume for receiving the foot of the knitted sock 300. - a knitting step (B) of the trapezoidal dorsal part 320 by progressively reducing the number of stitches knitted per row of stitches. In particular, the rows of stitches of the trapezoidal dorsal part 320 are knitted from front to back, that is to say by forming back and forth movements on the needle bed of the knitting machine between the medial 321 and lateral 322 edges. The knitting step (A) is carried out before the knitting step (B). - a step (C) of knitting the trapezoidal plantar part 330 from the distal end 328 of the knitted trapezoidal dorsal part 320 by progressively increasing the number of stitches knitted per row of stitches. In particular, the rows of stitches of the trapezoidal plantar part 330 are knitted from front to back, that is to say by forming back and forth movements on the needle bed of the knitting machine. - a knitting step (D) of the lateral joining region 350 and a medial joining region 340 which join the knitted trapezoidal dorsal and plantar parts 320, 330 along their respective lateral edges 322, 332 and medial edges 321, 331, the knitting of said lateral joining regions 350 and medial joining regions 340 being carried out progressively during the knitting step of the trapezoidal plantar part (C). The knitted trapezoidal dorsal and plantar parts 320, 330, and said knitted medial joining regions 340 and lateral joining regions 350, are knitted so as to extend into the toe region 305 and partly into the midfoot region 310 of the knitted sock 300. - a step of circular knitting (F) a tubular portion (Pnp) 378 comprising rows of circular knitted stitches to form a midfoot portion extending into the midfoot region 310 of the knitted sock 300. The length of the tubular portion (Pnp) 378 is determined by the number of rows of knitted stitches. - a step of placing part of the stitches of the tubular portion (Ppmp) 378, in particular those arranged in the dorsal part of the foot, on the needle bed of the knitting machine. - a step of knitting (G) a trapezoidal lower heel portion 380 by progressively increasing the number of stitches knitted per row of stitches, in particular from all or part of the stitches of the tubular portion (pp) 378 which have not been put on hold. In particular, the rows of stitches of the trapezoidal lower heel portion 380 are knitted from front to back, i.e., in a back and forth fashion, on the circular needle bed of the knitting machine. The trapezoidal lower heel portion 380 is knitted from a first end 383 to a second end 384 (see [Fig. 10]), the first end 383 of the trapezoidal lower heel portion 380 being adjacent to the proximal end 378a of a portion of the stitches of the tubular portion (Pnp) 378. - a step of knitting (H) a trapezoidal upper heel portion 390 by progressively increasing the number of stitches knitted per row of stitches, in particular from the second end 384 of the knitted trapezoidal lower heel portion 380. In particular, the rows of stitches of the trapezoidal upper heel portion 390 are knitted from front to back. - a knitting step (I) of an additional lateral securing region 400 and an additional medial securing region 405 which secure the knitted trapezoidal upper 390 and lower 380 heel parts along their respective lateral and medial edges, the knitting of said additional lateral and medial securing regions (400, 405) being carried out progressively during the knitting step (H) of the trapezoidal upper heel part 390. - a step of closing the knitted sock 300 by knitting stitches in continuity with the trapezoidal upper heel part 390 with the stitches waiting for the tubular portion (pp) 378. - optionally a step of circular knitting (F) of a tubular portion (p;) 370 comprising rows of circular knitted stitches to form a leg portion extending into the leg region of the knitted sock 300. - a step of circular knitting (E) of a foot introduction opening 360 into the foot receiving volume of the knitted sock 300. It is possible not to knit the tubular portion (p;) 370 or to a height different from that shown depending on the desired technical effect. If there is no portion (p,) 370, the introduction opening 360 is arranged substantially at the level of the ankle, above or below the malleolus depending on the desired technical effect. The process can alternatively begin with knitting the foot insertion opening and end with knitting the auxiliary through opening. The fourth example of knitted sock 500 includes a tra- back portion knitted trapezoidal 520 and a knitted trapezoidal plantar part 530 whose medial 521, 531 and lateral edges (not visible in [Fig. 12]) are joined by knitting in medial 540 and lateral joining regions. The dorsal and plantar portions 520,530 as well as the medial 540 and lateral securing regions extend into the SOS toe region and partly into the midfoot region 510. The sock 500 comprises a tubular portion (pp) 578 comprising rows of circular stitches, and arranged in the midfoot region 510 between the trapezoidal knitted pocket formed by the dorsal and plantar portions 520,530 and the heel region 515. Preferably, the knitted sock 500 is obtained by a knitting process comprising the following steps, in particular carried out in this order, in particular on a circular knitting machine comprising a circular needle bed: - a circular knitting step (E) of the opening for introducing the foot 560 into the volume for receiving the foot of the knitted sock 500. - optionally a step of circular knitting (F) of a tubular portion (p;) 570 comprising rows of circular knitted stitches to form a leg portion extending into the leg region of the knitted sock. - optionally a step of putting part of the meshes of the tubular portion (Ppnp) 570 on hold. - a step of knitting (H) a trapezoidal upper heel portion 590 by progressively decreasing the number of stitches knitted per row of stitches, in particular from a portion of the stitches of the tubular portion (p;) 570, in particular not left on hold. The rows of stitches of the trapezoidal upper heel portion 590 are knitted from front to back from a first end to a second end. - a step of knitting (G) a trapezoidal lower heel portion 580 by progressively increasing the number of stitches knitted per row of stitches, in particular from the second end of the trapezoidal upper heel portion 590. The rows of stitches of the trapezoidal lower heel portion 580 are knitted from front to back. The trapezoidal lower heel portion 580 is knitted from a first end to a second end, the first end of the trapezoidal lower heel portion being adjacent to the second end of the trapezoidal upper heel portion. - a knitting step (I) of an additional lateral joining region and an additional medial joining region which join the knitted trapezoidal upper and lower heel parts 580,590 along their respective lateral and medial edges, the knitting of said additional lateral and medial joining regions being carried out progressively during the knitting step of the part of trapezoidal lower heel {G). - a step of circular knitting (F) a tubular portion (Pnp) 578 comprising rows of circular knitted stitches to form a midfoot portion extending in the midfoot region of the knitted sock. In particular, the tubular portion (p,p) 578 is obtained by knitting at least a portion of the stitches of the tubular portion 570 and at least a portion of the stitches of the trapezoidal lower heel portion 580. - a knitting step (B) of a trapezoidal back portion 520 by progressively reducing the number of stitches knitted per row of stitches. In particular, the rows of stitches of the trapezoidal back portion 520 are knitted from front to back, that is to say by forming back and forth movements on the circular needle bed of the knitting machine. The back portion 520 is knitted from a portion of the stitches of the tubular portion (pp) 578. - a step (C) of knitting a trapezoidal plantar part 530 from the distal end 528 of the knitted trapezoidal dorsal part 520 by progressively increasing the number of stitches knitted per row of stitches. In particular, the rows of stitches of the trapezoidal plantar part 530 are knitted from front to back, that is to say by forming back and forth movements on the circular needle bed of the loom. - a knitting step (D) of a lateral joining region and a medial joining region 540 which join the knitted trapezoidal dorsal and plantar parts 520,530 along their respective lateral and medial edges, the knitting of said lateral and medial joining regions being carried out progressively during the knitting step of the trapezoidal plantar part (C). - a step of closing the knitted sock 500 by knitting stitches in the continuity of the trapezoidal plantar part 530 with the corresponding stitches of the tubular portion (pnp) 578. [Fig. 13] shows a variant of a medial bonding region 640 of an example sock 600. This medial bonding region 640 includes through openings 642, and is reinforced by at least one binding yarn 650 knitted into the knitted trapezoidal dorsal and plantar portions 620, 630 and extending between them in the medial region 640. This binding yarn is knitted at the end of a row of stitches of the plantar portion 630 with one or more stitches of the corresponding row of stitches of the dorsal portion 650 by forming one or more blocking stitches, such as one or more knots. The same arrangement can be applied to the lateral bonding region. [Fig.14] shows the knitting diagram of the knitted trapezoidal dorsal part 630 and the knitted trapezoidal plantar part 620 comprising rows of stitches knitted with a first yarn having a first color alternating with rows of stitches knitted with a second yarn having a second color. Blocking stitches 635, such as knots, are made between the medial edge 631 and the medial edge 621 to secure them together, every two rows of stitches. Similarly, the lateral edge 622 is secured by knitting to the lateral edge 632 by blocking stitches such as knots. This method of binding the edges together makes it possible to reinforce and therefore improve the strength of the medial and lateral securing regions.

Claims

Claims

1. Knitted sock (1,200,300,500,600) comprising a toe region (5,305,505), a midfoot region (10,310,510), and a region of heel (15,515), and possibly a leg region, characterized in that said knitted sock (1,200,300,500,600) comprises a knitted trapezoidal back part (20,220,320,520,620) and a part knitted trapezoidal plantar (30,230,330,530,630) which are soli- darized by regions of medial knitted solidarity (40,340,540,640) and lateral (50,350), and in that the plantar and knitted trapezoidal back (20220,320,520,620;30,230,330,530,630), and the regions of solidarity- knitted medial and lateral rization (40,340,540,640; 50,350), extend into the toe region (5,305,505) and at least partly in the midfoot region (10,310,510).

2. Knitted sock (1,200) according to claim 1, characterized in that that the knitted trapezoidal plantar and dorsal parts (20,220;30,230), and the medial and lateral solidarity regions knitted (40,50), extend into the toe region (5), and into the region from the midfoot (10) of the sock to the heel region (15).

3. Knitted sock (1,200) according to claim 2, characterized in that that the knitted trapezoidal back part (20,220) is knitted from of at least part of the meshes of a tubular portion (pin OR Pnp OR p;) comprising one or more rows of circular stitches and covering all or part of the user's ankle.

4. A knitted sock (300,500,600) according to either of the claims indications 1 and 2, characterized in that the knitted sock (1,300,500,600) includes at least one auxiliary through opening (375), dorsal or plantar, knitted and having a knitted border (376), in particular extending into the midfoot region (310) of the knitted sock.

5. A knitted sock (1,200,300,500,600) according to any one of the re- claims 1 to 4, characterized in that at least one of the regions of knitted medial and lateral reinforcement (40,340,540,640; 50,350) comprises a plurality of knitted through openings (42,242,642).

6. A knitted sock (1,200,300,500,600) according to any one of the re- claims | to 5, characterized in that the trapezoidal dorsal part knitted (20,220,320,520,620) is knitted with rows of stitches backbones which are knitted back and forth, and in that the part knitted trapezoidal plantar (30,230,330,530,630) is knitted with rows of plantar stitches which are knitted back and forth.

7. Knitted sock (1,200,300,500,600) according to any one of the re- claims | to 6, characterized in that the trapezoidal plantar part knitted (30,230,330,530,630) includes a toe end portion (35), and the knitted trapezoidal dorsal part (20,220,320,520,620) comprises a toe end portion (25), and in that the portion toe end (35) of the knitted trapezoidal plantar part (30,230,330,530,630) is knitted continuously with the part toe end (25) of the knitted trapezoidal dorsal part (20,220,320,520,620).

8. A knitted sock (1,200,300,500,600) according to any one of the re- claims | to 7, characterized in that the trapezoidal plantar part knitted (30,230,330,530,630) and the knitted trapezoidal back part (20,220,320,520,620) together form a pocket (110) of sens- possibly trapezoidal arranged to receive at least in part the toes of a foot, and at least partly the midfoot region (10,310,510) of the foot.

9. A knitted sock (1,200,300,500,600) according to any one of the re- claims | to 8, characterized in that the trapezoidal dorsal part knitted (20,220,320,520,620) comprises a distal portion (28a) and a proximal part (26a), and in that the number of stitches (a;) in a row of stitches of the distal part (28a) is less than the number of stitches (b;) in a row of stitches of the proximal part (26a), in particular the number a, is less than or equal to 0.50 * bu.

10. A knitted sock (1,200,300,500,600) according to any one of the re- claims 1 to 9, characterized in that the number of meshes (k) of any row of stitches (n) knitted in the back part tra- knitted ezoidal (20,220,320,520,620) is greater than or equal to number of stitches (p) in the row of stitches (n+2) knitted after the row of stitches (n) and in said knitted trapezoidal dorsal part (20), the numbers n, p and k being integers and different from 0.

11. Knitted sock (1,200,300,500,600) according to any one of the re- claims 1 to 10, characterized in that the trapezoidal dorsal part knitted (20,220,320,520,620) and the knitted trapezoidal plantar part (30,230,330,530,630) are symmetrical along a transverse axis of symmetry (T1) passing between the distal end (28) of the dorsal part knitted trapezoidal and the distal end (38) of the plantar part tra- knitted pezodiac.

12. A knitted sock (1,200,300,500,600) according to any one of the re- claims | to 11, characterized in that the knitted sock includes a knitted trapezoidal lower heel portion (80,280,580) and a knitted trapezoidal upper heel portion (90,290,590) which are joined by medial solidarity regions {100) and knitted auxiliary sides.

13. A knitted sock (300,500,600) according to any one of the claims- indications 1 to 12, characterized in that the knitted sock comprises at least one knitted portion (378,578) with rows of circular stitches cular, and in that said knitted portion (378,578) extends into the midfoot region (310,510) of the knitted sock.

14. A knitted sock (1,200,300,500,600) according to any one of the re- claims 1 to 13, characterized in that the plantar parts (30,230,330,530,630) and dorsal (20,220,320,520,620) trapezoidal and knitted fabrics comprise less than 10% by mass of one or more yarn(s) elastomeric(s).

15. Method of knitting a knitted sock (1,200,300,500,600) comprising a toe region (5,305,505), a midfoot region (10,310,510), and a heel region (15,515), and possibly a leg region, particularly according to any one of the re- indications 1 to 14, characterized in that said method comprises: - a knitting step (B) of a back part (20,220,320,520,620), or plantar (30,230,330,530,630), trapezoidal gradually decreasing- sively the number of stitches knitted per row of stitches; - a knitting step (C) of a plantar part (30,230,330,530,630), or dorsal (20,220,320,520,620), trapezoidal from the end distal (28) of the dorsal, plantar, trapezoidal part knitted in gradually increasing the number of stitches knitted per row of meshes; - a knitting step (D) of a lateral joining region (50,350) and a medial solidarity region (40,340,540,640) which join the dorsal and plantar trapezoidal parts knitted according to their respective lateral (32,532) and medial (31,531) edges, the knitting (D) said lateral and medial joining regions being carried out gradually during the knitting stage (C); - in that the knitted trapezoidal dorsal and plantar parts (20,220,320,520,620; 30,230,330,530,630), and said regions of solida- knitted medial and lateral rization, are knitted so as to extend in the toe region (5,305,505) and at least partly in the region midfoot (10,310,510) of the knitted sock; - and in that said method comprises a step of knitting (A) a opening (60,260,360,375,560) opening into the reception volume of the foot of the sock.

16. Knitting method according to claim 15, characterized in that the knitting step (A) is carried out before the knitting step (B).

17. A knitting method according to either of claims 15 and 16, characterized in that the trapezoidal dorsal part (20,220,320,520,620) is knitted with rows of back stitches knitted back and forth returns, and the trapezoidal plantar part (30,230,330,530,630) is knitted with rows of plantar stitches knitted back and forth returns.

18. A knitting method according to any one of claims 15 to 17, characterized in that the knitting step (A) is a knitting step circular of an opening for introducing the foot (60,260,560) into the interior volume for receiving the foot of the knitted sock.

19. Knitting method according to any one of claims 15 to 17, characterized in that the knitting step (A) is a knitting step of an auxiliary through opening (375) dorsal or plantar and de- plugging into the interior volume of the sock foot knitted, said opening (375) extends into the midfoot region (310) of the knitted sock, preferably said opening (375) is arranged at least partly in the dorsal (320) or plantar part (330) knitted trapezoid.

20. | Knitting method according to claim 19, characterized in that said method further comprises a circular knitting (FE) step of an opening for introducing the foot (360) into the interior volume of receiving the foot of the knitted sock, preferably said step (E) is performed after step (A).

21. A knitting method according to any one of claims 15 to 20, characterized in that said method further comprises a step of circular knitting (F) of a tubular portion (370,378,570,578) comprising rows of circular knitted stitches arranged in the midfoot region (10,310,510) or in the leg region.