Textiles: fiber preparation – Assembling – Formed web
Patent
1998-05-06
2000-07-11
Calvert, John J.
Textiles: fiber preparation
Assembling
Formed web
191611, 19296, D04H 1100
Patent
active
060853913
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention pertains to a fleece folding machine with a plurality of carriages movable in relation to one another and a plurality of laying belts between which the nap is taken up and guided at least in some areas, wherein the fleece folding machine has a belt intake of the laying belts on the intake side for taking up the nap, and wherein the belt intake has an obliquely downwardly sloped intake section with two belt sections running adjacent to one another.
BACKGROUND OF THE INVENTION
Such a fleece folding machine has been known from FR-2 553 102. The fleece folding machine, designed as a so-called belt layer, has two main carriages movable relative to one another and two endless and rotatingly driven laying belts, which are guided in loops. The laying belts run in parallel at least in the section between the main carriages, and they take up and guide the nap between them. On the intake side, the fleece folding machine has a so-called belt intake of the laying belts for taking up the nap. The laying belts, moved on from two sides, meet here and form an intake section with an opening angle of the laying belts of at least 20.degree.. The intake slot at the inlet of the intake section is very large as a result and is substantially wider than the nap thickness. The nap fed in on one of the laying belts is deflected obliquely downward against the horizontal at an acute angle in the belt intake. The nap lies open in the intake section due to the large opening angle and the wide intake slot and is clamped and guided on both sides between the laying belts only at the lower end between the two adjacent deflecting rollers. The nap may be lifted off from the lower laying belt in the intake section at high speeds. This may lead to disturbances, especially in sensitive naps. The feed speed is limited in this arrangement.
The nap fed on the laying belt is deflected downwards in the belt intake. In the belt intake, the two laying belts have two belt sections that run in parallel next to each other and in a straight line and form the said intake slot. These belt sections extend downwards at right angles in the state of the art, as a result of which the nap fed in horizontally is deflected by 90.degree. at the belt intake. It was found in practice that such a belt intake can be used for limited nap feed speeds and work speeds of the fleece folding machine only. If the feed speeds become too high, tearing off may occur in the very light and highly sensitive fiber nap.
FR-2 553 102 shows another fleece folding machine. In the belt intake, the two laying belts have two straight belt sections running in parallel next to each other, which extend vertically downward, as a result of which the nap fed in horizontally is deflected by 90.degree. at the belt intake. It was found in practice that such a belt intake can likewise be used for limited feed speeds of the nap and limited working speeds of the fleece folding machine only. If the feed speeds become too high, tearing off may occur in the very light and highly sensitive fiber nap.
Developments, e.g., according to EP-A-0 517 568, tend to provide a very broad and wide open intake hopper before the belt intake. The laying belt feeding in the nap has an obliquely falling belt section, on which nap is conveyed, however, open. The second laying belt comes in only at the lower end of the belt section, as a result of which the nap enters between the two laying belts at this point only and is taken up and guided bilaterally by the laying belts at the deflection of the belt only. The belt intake is arranged at the upper main carriage and consequently movably in this case as well.
WO 91/156018 shows another variant of the belt intake, in which both laying belts are guided via two large deflecting rollers at the main carriage. A wide intake hopper is also formed as a result for the nap fed in on the one laying belt. The two large deflecting rollers are arranged horizontally next to each other approximately at the same level, as a result of which the n
REFERENCES:
patent: 2387150 (1945-10-01), Hlavaty
patent: 3877628 (1975-04-01), Asselin et al.
patent: 4830351 (1989-05-01), Stanislaw
Autefa Maschinenfabrik GmbH
Calvert John J.
Welch Gary L.
LandOfFree
Matting device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Matting device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Matting device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-529674