Stock material or miscellaneous articles – Two dimensionally sectional layer – With frame – casing – or perimeter structure
Patent
1991-01-28
1993-08-31
Lesmes, George F.
Stock material or miscellaneous articles
Two dimensionally sectional layer
With frame, casing, or perimeter structure
428193, 428226, 428258, 428259, 52 3, 52 4, 52 5, E04D 134, E04D 500, B32B 302, B32B 2302
Patent
active
052407560
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a tarpaulin comprising fastening means for fastening the tarpaulin to a transport means.
BACKGROUND OF THE INVENTION
Tarpaulins of this type are used widely during transport to protect the load against rain and snow or other disadvantageous environmental or weather effects. Tarpaulins are usually made of woven and/or laminated polyethene or polypropylene. They usually comprise cords or the like means for binding the tarpaulin to the transport means and for tightening it over the load. Prior art tarpaulins, however, are not alone able to keep the load in position during transport, because they are easily torn under the influence of the weight of the load when a ship sways or when a lorry brakes suddenly, for instance. According to regulations, a load should be fastened so as to withstand forces of 1 G in every direction in transport by sea and forces of 1 G in the forward direction and forces of 0.5 G in the backward or any other direction in transport by land. In order to comply with the regulations, the load has to be fastened separately by means of various irons and chains, which requires several workmen at the different transport stages and in many cases also machines for displacing heavy irons and chains. Similarly, the load fastening means are difficult to detach at the receiving end. The fastening means are not usually returned by the receiver, which increases the cost of transport. In addition, the fastening chains may damage the load, e.g., tear down paper rolls.
SUMMARY OF THE INVENTION
The object of the present invention is to eliminate the above problems and disadvantages.
This is achieved by means of a tarpaulin of the type described in the preamble, which according to the invention is characterized in that the warp yarns of the basic fabric are multifilament yarns, and that areas woven mainly with flat-film yarns as weft yarns and reinforced areas woven with multifilament weft yarns having a greater thickness and tensile strength than the warp yarns alternate in the basic fabric in the warp direction, the fastening means being attached to the reinforced areas of the basic fabric.
The tarpaulin according to the invention is sufficiently durable to be used both for the packing and protection of the load as well as for the fastening of the load so as to comply with the above-mentioned regulations. No other fastening means are needed.
Since the fastening means are attached to the reinforced areas of the tarpaulin, the strains caused by the load are mainly exerted on these reinforced areas. For this reason, the areas between the reinforced areas can possess considerably poorer tensile strength. This involves several advantages.
First, the use of thick multifilament weft yarns increases remarkably the weight of the tarpaulin. As such thick multifilament yarns are used only in relatively narrow zones while flat-film yarn is used in the zones between them, the tarpaulin is sufficiently light to be handled by a single workman who is able to cover the load easily and rapidly with resultant savings in labour costs.
Second, the use of relatively narrow reinforced areas reduces the cost of manufacture of the tarpaulin and, as a consequence, its price, because thick multi-filament yarn is considerably more expensive than flat-film yarn. The cost of manufacture is largely dependent on the time spent on weaving. The solution according to the invention thus provides a tarpaulin which withstands high loads while the weight and price of the tarpaulin are optimized.
The invention will now be described in more detail by way of example with reference to an embodiment shown in the attached drawings, wherein
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a planar view of a tarpaulin according to the invention; and
FIG. 2 shows a fastening means to be used at the ends of the tarpaulin.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a specific tarpaulin according to the invention. The tarpaulin 1 comprises a woven basic fabric 2 of desired shape, in this particular case rectangular
REFERENCES:
patent: 1871571 (1932-08-01), Weber
patent: 2455237 (1948-11-01), Davis
patent: 2942327 (1960-06-01), Corry
patent: 3521927 (1970-07-01), Barry
patent: 3930091 (1975-12-01), Lewis et al.
patent: 4113907 (1978-09-01), Haage et al.
patent: 4252850 (1981-02-01), de Winter
patent: 4298645 (1981-11-01), Obayashi et al.
patent: 4574107 (1986-03-01), Ferrari
patent: 4589804 (1986-05-01), Paeglis et al.
patent: 4590121 (1986-05-01), Mahr
patent: 4590715 (1986-05-01), Pandell
Derwent Abstract.
Cederblom Christer
Finell John
Lesmes George F.
Morris Terrel
Wisapak Oy AB
LandOfFree
Tarpaulin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tarpaulin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tarpaulin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2296348