Textiles: knitting – Fabrics or articles – Warp
Reexamination Certificate
2001-10-09
2002-11-12
Worrell, Danny (Department: 3765)
Textiles: knitting
Fabrics or articles
Warp
C066S196000
Reexamination Certificate
active
06477865
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a three-dimensional marquisette-like knitted fabric that is formed of double web and has good dimensional stability in knitting and widthwise directions.
BACKGROUND ART
Conventionally, a mesh fabric formed of quadrangular mesh openings, that is, the marquisette-like knitted fabric has been formed by single-web weft knitting. The single-web knitted fabric is poor in thickness-wise dimensional stability and in bulkiness despite of mesh structure. Thus, the single-web knitted fabric has limited uses and is not suitable in the field of use where the thickness or three-dimensional structure is required.
Meanwhile, three-dimensional nets having three-dimensional spaces at mesh openings are proposed which are comprised of; front and back mesh webs; and connecting yarns that are alternately passed between the front and back mesh webs in a manner the front and back mesh webs are connected together. Among them are three-dimensional nets proposed by the applicant of the present invention. In the proposed three-dimensional nets, compressive strength and shape retainability are particularly improved (for example, Japanese Granted Patent Nos. 2,547,693 and 2,762,052).
In the proposed three-dimensional nets, the three-dimensional mesh spaces are defined by cord portions that have in themselves open spaces air and water conductible. Thus, the proposed three-dimensional nets are good in air conductibility and water conductibility. Nevertheless, the front and back mesh webs are formed by joining the braids continuing in the knitting direction with the braids adjoining on the right and left sides alternately.
Therefore, the three-dimensional net mentioned above requires some treatment for spread-widening of the three-dimensional mesh spaces, such as heat setting after knitting that is applied while the net is expanded both in the knitting and widthwise directions. Moreover, when the net is applied with tension in knitting direction, the three-dimensional mesh spaces are elongated in the knitting direction and narrowed in a knitting width direction, although the net has good compressive strength. This is because of such net structure the braids formed of one or a plurality of wales continuing in the knitting direction are joined with the adjoining braids on the right and left sides alternately.
Hence, the proposed three-dimensional net has poor dimensional stability in knitting and widthwise directions. Therefore, some reinforcer must be accompanied in a use where tensile strength and the dimensional stability both in the knitting and widthwise directions are required.
In addition, front and back surfaces of the three-dimensional net are formed of the planar braids on the front and back mesh webs, which have little unevenness if anything, and are relatively slippery. Therefore, in some application of the three-dimensional nets, the nets have to be laminated or composited with non-slippery or rough-surfaced materials.
In view of the above, the present invention is to provide a three-dimensional marquisette-like knitted fabric having following advantages—good dimensional stability and shape reatainability in the knitting and widthwise directions despite of three-dimensional mesh structure; sufficient tensile strength in the knitting and widthwise directions; good linearities in mechanical properties; as well as other features such as air retainability, air conductibility, water conductibility, optical transmittance, transparency and bulkiness. The present invention is also to provide a three-dimensional marquisette-like knitted fabric having features related to double-layered or triple layered structure that is for example formed of natural fabric and synthetic fabric; and having unevenness on the surfaces such as to prevent slippage; thereby being suitable for variety of applications due to such features.
DISCLOSURE OF THE INVENTION
A three-dimensional marquisette-like knitted fabric made by warp knitting as a double-web knitted fabric and comprising: front and back mesh webs; and connecting yarns passed alternately between the mesh webs, at least one of said mesh webs being knitted as a marquisette-like structure comprised of; stitch rows of chain stitches; and inlay yarns knitting-width-wise inlayed rightward and leftward alternately into the stitch row. In other words, the invention encompasses; the knitting fabric in which both of the front and back mesh webs has a marquisette-like construction; and the knitted fabric in which one of the mesh webs has a marquisette-like g construction and another one of the mesh webs has a net construction or a mesh construction or the like.
The marquisette-like mesh webs may be fabricated as follows: shifting inlay yarn that constitute the mesh web traverse-wise by at least one wale at the required course position in the knitting direction to form quadrangular mesh openings as in so-called marquisette construction; in otherwise, by shifting the stitch rows traverse-wise by at least one wale at the required course position in the knitting direction to form mesh openings into a quadrangular shape. In such a case, the inlay yarn is recommended to be inlayed traverse-wise corresponding to the shifting of the stitch row.
The above-mentioned marquisette-like structure or construction may not be limited to the above marquisette construction, but fabrics using the marquisette construction as a base construction and applied with variations or modifications, or other fabrics made by quadrangular mesh openings or the like as a base structure and having an appearance of marquisette-like may be used.
Since the three-dimensional marquisette-like knitted fabric of structures mentioned above according to the present invention has a three-dimensional net structure with quadrangular mesh openings on at least one of the front and back surfaces, it is high in void content, light in weight, and superior in air conductibility or water conductibility. In addition to it, since at least one of the front and back mesh webs is formed into so called marquisette-like structure in which the mesh openings mainly assume a quadrangular shape by the stitch row and inlay yarn, it is moderately resilient and tough; and thus even when the other surface has other net structures of honeycomb or rhombic shape, it has significant tensile strength in the knitting and widthwise directions, is superior in dimensional stability in the knitting and widthwise directions; and shape retainability can be preferably maintained. Especially when the front and back mesh webs are marquisette-like knitting construction, the dimensional stability in the knitting and widthwise directions can be maintained further preferably; and simultaneously the knitted fabric being resilient and having body may be obtained.
The above-mentioned three-dimensional marquisette-like knitted fabric may be fabricated in such a manner that; connecting yarns connecting the front and back mesh webs are shifted traverse-wise by at least one wale and passed as inclined at every required course position according to the marquisette-like structure or a net structure such as honeycombed, of the front and backmesh webs; thus pass-between portions of the connecting yarns are formed into a marquisette-like structure.
In this case, since a three-dimensional marquisette-like structure is formed at between the front and back mesh webs, the surrounding portion, of the connecting yarn, defining the three-dimensional quadrangular mesh openings includes inclined-wise extending connecting yarns not only at the portion in the knitting direction along the stitch row, but also at the portion in the knitting-width direction; and thus the entire surrounding portion forms a wall; thereby being superior in shape retainability and compressive strength of the entire knitted fabric.
It is particularly preferable when the connecting yarns are shifting traverse-wise at every course position corresponding to marquisette-like knitting construction of at least one of the front and back mesh webs and fabricated into a mar
Asahi Doken Kabushiki Kaisha
Jordan and Hamburg LLP
Worrell Danny
LandOfFree
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