Woven loop press base fabric having high density top layer

a top layer, high density technology, applied in weaving, drying machines, light and heating equipment, etc., can solve the problems of undesirable vibration, small irregularities or imperfections in the support layer, and fabrics typically provide limited batt anchorage and sheet suppor

Inactive Publication Date: 2001-07-03
ASTENJOHNSON
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Slight irregularities or imperfections in the support layer are undesirable in virtually all papermaking operations.
Inconsistencies in the felt thickness, gauge or weight can cause undesirable vibrations during operation of the equipment.
However, these base fabrics typically provide limited batt anchorage and sheet support due to low surface contact area.
This process can be costly and time consuming.
Another problem associated with endlessly woven seamed fabrics is seaming of the fabric.
A common problem associated w

Method used

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  • Woven loop press base fabric having high density top layer
  • Woven loop press base fabric having high density top layer
  • Woven loop press base fabric having high density top layer

Examples

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Embodiment Construction

The preferred embodiment will be described with reference to the drawing figures wherein like numerals represent like elements throughout.

Referring to FIGS. 4 and 5 the preferred fabric 100 generally comprises a base fabric 110 with batt material 112 attached thereto. The base fabric 110 comprises three layers of machine direction (MD) yarns 114, 116 and 118 interwoven with a system of cross-machine direction (CMD) yarns 120. MD layers 114 and 116 are woven in stacked pairs and form seam loops 122 at each end of the base fabric 110. The third layer MD yarns 118 extend above MD layers 114 and 116 and are substantially parallel thereto. In the preferred embodiment, two third layer MD yarns 118 are provided for every pair of stacked MD yarns 114 and 116.

The fabric 110 is preferably endless woven using a two shuttle loom. The first shuttle weaves the lower and intermediate MD layers 114 and 116 and the second shuttle weaves the upper MD layer 118. As shown in FIG. 6, the base fabric 110...

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Abstract

A papermaker's fabric having a system of primary machine direction yarns which form seaming loops at each end of the fabric and a system of secondary machine direction yarns. A system of cross-machine direction yarns are interwoven with the primary and secondary systems of machine direction yarns in a weave pattern that provides adjacent balancing yarns that maintain the seam loops in substantially vertical alignment.

Description

BACKGROUND OF INVENTION1. Field of the InventionThe present invention generally relates to a woven fabric for use in a paper, cellulose or board manufacturing machine that is seamed by interlocking loops along each of two fabric edges to form an endless woven fabric.2. Description of the Prior ArtAs will be known to those skilled in the art, papermaking machines generally include three sections which are referred to as the forming, press and dryer sections. A felt is generally employed to transport the formed, wet sheet through the press and dryer sections of the papermaking equipment. The felt must be particularly adapted to specific conditions encountered in papermaking.Typically, such felts include a supporting base, such as a woven fabric, and a paper carrying or supporting layer fixed to the base. The paper carrying or supporting layer is generally softer and smoother than the base layer. The support layer is often a non-woven batt material which has been affixed to the base an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D21F1/00
CPCD21F1/0054
Inventor LEE, HENRY J.SUMMER, BILLY
Owner ASTENJOHNSON
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