摘要:
A structured fabric (100) for use in a paper making machine for forming a web (38) of fibrous material includes: a plurality of warp yarns (102); and a plurality of weft yarns (104), the plurality of warp (102) and weft yarns (104) being interwoven with one another in a repeating weave pattern (106), forming a web- facing side (108) of the structured fabric (100), and forming a plurality of pockets (124) each of which includes a plurality of margins (128) and a bottom (126) and is open on the web- facing side (108). The repeating weave pattern (106) includes: the plurality of warp yarns (102) including a plurality of warp knuckles (120) each formed by floating over adjacent ones of the plurality of weft yarns (104) on the web-facing side (108), the plurality of weft yarns (104) including a first group of weft yarns (104) and a second group of weft yarns (104), the first group of weft yarns (104), but not the second group of weft yarns (104), forming a plurality of weft knuckles (122) each formed by floating over adjacent ones of the plurality of warp yarns (102) on the web- facing side (108), the plurality of warp (102) and weft (104) knuckles being configured for impressing the web (38), the second group of weft yarns (104), but not the first group of weft yarns (104), forming at least partially a respective the bottom (126) of each of the plurality of pockets (124), the plurality of pockets including a first type of pocket (124A) and a second type of pocket (124B), the plurality of margins (128) of the first type of pocket (124A) being formed only by the plurality of warp knuckles (120), the plurality of margins (128) of the second type of pocket (124B) being formed by both the plurality of warp knuckles (120) and the plurality of weft knuckles (122).
摘要:
A structured fabric for use with a papermaking machine for the production of a fibrous web. The structured fabric includes a plurality of weft yarns and a plurality of warp yarns. The plurality of warp yarns interact with the weft yarns to produce a weave pattern. The plurality of warp yarns include a first set of warp yarns and a second set of warp yarns. The first set of warp yarns are woven as a plain weave. The second set of warp yarns form an impression layer. The first set of warp yarns are in a first plane, the second set of warp yarns have a surface in a second plane. The second plane is positioned farther from the machine facing side of the fabric than the first plan to form the impression layer. The first set of warp yarns have a first cross-sectional area and the second set of warp yarns have a second cross-sectional area. The first cross- sectional area is less than the second cross-sectional area.
摘要:
The invention relates to a fibrous web including a fibrous construct having at least one formed surface feature, the surface feature including a topographical pattern reflective of a weave pattern in a fabric used in a papermaking machine, the fabric including a single layer of yarns arranged in a repeating weave pattern, each weave pattern including a plurality of warp yarns substantially oriented in a machine direction (MD) defining MD yarns, and a plurality of weft yarns substantially oriented in a cross machine direction (CD) defining CD yarns, the MD yarns each having at least one long float within the weave pattern, each long float being adjacent to at least one other long float of an MD yarn, the weave, pattern being a plain weave apart from the long floats.
摘要:
A fabric for a papermaking machine, the fabric including a machine facing side and a web facing side having pockets formed by warp and weft yarns. Each pocket is defined by four sides on the web facing side, two of the four sides each formed by a warp knuckle of a single warp yarn that passes over three consecutive weft yarns to define the warp knuckle, the other two of the four sides each formed by a weft knuckle of a single weft yarn that passes over three consecutive warp yarns to define the weft knuckle, a lower surface of each pocket being formed by first and second lower warps yarns and first and second lower weft yarns, a first warp knuckle being of the first warp yarn passed over by a first weft knuckle and the first lower warp yarn being of the second warp yarn passed over by the first weft knuckle and the second lower warp yarn being of the third warp yarn passed over the first weft knuckle, a second weft knuckle being of the first weft yarn passed over by the first warp knuckle and the second lower weft yarn being of the second weft yarn passed over by the first warp knuckle and the first lower weft yarn being of the third weft yarn passed over by the first warp knuckle, the first lower warp yarn passing under the first and second lower weft yarns, and the second lower warp yarn passing over the first and second lower weft yarns.
摘要:
A fabric for a papermaking machine, the fabric including a machine facing side and a web facing side having pockets formed by warp and weft yarns. Each pocket is defined by four sides on the web facing side, two of the four sides each formed by a warp knuckle of a single warp yarn that passes over three consecutive weft yarns to define the warp knuckle, the other two of the four sides each formed by a weft knuckle of a single weft yarn that passes over three consecutive warp yarns to define the weft knuckle, a lower surface of each pocket being formed by first and second lower warps yarns and first and second lower weft yarns, a first warp knuckle being of the first warp yarn passed over by a first weft knuckle and the first lower warp yarn being of the second warp yarn passed over by the first weft knuckle and the second lower warp yarn being of the third warp yarn passed over the first weft knuckle, a second weft knuckle being of the first weft yarn passed over by the first warp knuckle and the second lower weft yarn being of the second weft yarn passed over by the first warp knuckle and the first lower weft yarn being of the third weft yarn passed over by the first warp knuckle, the first lower warp yarn passing under the first and second lower weft yarns, and the second lower warp passing over the first lower weft yarn and under the second lower weft yarn.
摘要:
A structured papermaking fabric (28) for making a bulky tissue web, comprising: a web facing side (100) and an opposite side, the web facing side comprising a structure formed by interweaving of transverse yarns (K) with longitudinal yarns (S), the structure comprising a plurality of pattern areas (P) being regularly distributed on the web facing side and each of said pattern area being surrounded by an edge area (101), said pattern areas are woven in a plain weave and each of said edge areas comprising at least one longitudinal (102) and at least one transverse (103) edge segment, said longitudinal edge segment being formed by weaving of a longitudinal yarn over at least four, preferably at least five, consecutive transverse yarns, said transverse edge segment being formed by weaving of a transverse yarn over at least four consecutive longitudinal yarns.
摘要:
A papermaker's fabric, usable in the forming section of a paper machine, having two layers of cross-machine-direction (CD) yams. Interwoven with the CD yams is a system of MD yams. At least some of the MD yams are grouped into alternating pairs comprising a crossing pair having a first MD yam and a second MD yarn and a second pair having a third MD yarn and a fourth MD yam. The first MD yam and the second MD yam combine to weave each CD yam in the first layer and cross between the first layer and the second layer. The left and right warp yarns in the pairs are aligned in such a way that like adjacent yams from adjacent pairs have MD cell lengths greater than or less than the MD cell lengths from non-like adjacent yams from adjacent pairs. The third MD yam is interwoven with the first layer of CD yarns and the fourth MD yam is interwoven with the second layer of CD yams. In this manner, a paired warped triple layer forming fabric may be produced which minimizes drainage and crossover point topographical markings.
摘要:
A composite papermaking fabric comprising an upper support fabric and a lower contact fabric. The upper fabric is formed of warp yams, fabric born warp yams and weft yams interwoven to provide the upper fabric with a support surface forming a one up, one down weave. The lower fabric is formed of the fabric born warp yams interwoven with weft yarns in a weave pattern which provides a weft yam dominated contact surface. Each of the fabric born warp yams also weaves over at least one of the upper fabric weft yarns during each repeat of the weave pattern forming binding points which bind the upper and lower fabrics together.
摘要:
A surrogate RPG includes a warhead with an outer conductive portion and an inner conductive portion spaced from the outer conductive portion. A sabot includes an electrical circuit configured to monitor conductivity between the inner and outer conductive portions. The surrogate RPG can be used to test the effectiveness of various RPG defeat technologies.
摘要:
A structured fabric for use in a paper making machine for forming a web of fibrous material includes: a plurality of warp yarns; and a plurality of weft yarns, the plurality of warp and weft yarns being interwoven with one another in a repeating weave pattern, forming a web- facing side of the structured fabric, and forming a plurality of pockets each of which includes a plurality of margins and a bottom and is open on the web-facing side. The repeating weave pattern includes: the plurality of warp yarns including a plurality of warp knuckles each formed by floating over adjacent ones of the plurality of weft yarns on the web-facing side, the plurality of weft yarns including a first group of weft yarns and a second group of weft yarns, the first group of weft yarns, but not the second group of weft yarns, forming a plurality of weft knuckles each formed by floating over adjacent ones of the plurality of warp yarns on the web-facing side, the plurality of warp and weft knuckles being configured for impressing the web, the second group of weft yarns, but not the first group of weft yarns, forming at least partially a respective the bottom of each of the plurality of pockets, the plurality of pockets including a first type of pocket and a second type of pocket, the plurality of margins of the first type of pocket being formed only by the plurality of warp knuckles, the plurality of margins of the second type of pocket being formed by both the plurality of warp knuckles and the plurality of weft knuckles.