 High angular resolution x-ray collimator |
| In order to detect contraband such as explosive materials and illicit drugs, systems employing ... |
|
| Tandem laser assembly |
| What is claimed is: 1. A laser discharge tube for producing an output laser beam having a plurality ... |
|
| Current converter assembly in a flat housing |
| We claim: 1. Current converter assembly, comprising a parallelepipedal housing having an upper ... |
|
| Method of detecting frame edge |
| Accordingly, an object of the present invention is to enhance the practicability and versatility of ... |
|
| Method of and apparatus for positioning image areas of film |
| What is claimed is: 1. A method of positioning image areas of an exposed and developed strip of ... |
|
| Optical projection and scanning apparatus |
| We claim: 1. Apparatus for photographically exposing an image-receiving surface to a light image of ... |
|
| Photolithographic projection apparatus using light in the far ultraviolet |
| In accordance with the principles of the present invention, a photolithographic image projection ... |
|
| Pattern generator part holder |
| OF THE PRESENT INVENTION A part holder used in conjunction with a pattern generation device which ... |
|
| Method of making high transconductance heterostructure field effect transistor |
| Briefly stated, the present invention creates a high transconductance HFET that utilizes non-alloy ... |
|
| Semiconductor integrated circuit with dummy patterns |
| It is an object of the present invention to provide semiconductor integrated circuit device having ... |
|
|
Method for the production of a nonwoven fabric
| Details |
Inventors: Platt, Louis; Wishman, Marvin; Gentry, David R.; Williams, Jake E.;
Assignee: Phillips Petroleum Company (Bartlesville, OK)
Primary Examiner: Wityshyn; Michael G.
Assistant Examiner:
Attorney, Agent or Firm:
A nonwoven fabric is produced by forming a batt comprising staple fibers oriented primarily in the fill direction, drafting the batt in the warp direction in a first warp-drafting zone, needling the drafted batt, drafting the needled batt in the warp direction in a second warp-drafting zone, and drafting the warp-drafted, needled batt in the fill direction in a fill-drafting zone. A fabric, apparatus for producing the fabric, and a method for fusing a nonwoven batt are provided. |
|
DETAILED DESCRIPTION OF THE INVENTION The apparatus of the invention is more fully understood by referring to the drawings and in particular FIGS.
1 and 2 wherein the embodiment of the apparatus shows a batt-forming means comprising two web-forming trains A and A' in which feed means 10,10' such as bale breakers, blender boxes, feed boxes, etc.
, feed fibers in the form of staple, such as polypropylene staple, to breaker carding machines 12,12'.
The carding machines 12,12' produce carded webs 14,14' of fibers which are picked up by the takeoff aprons 16,16' of crosslappers 20,20'.
Crosslappers 20,20' also comprise lapper aprons 18,18' which traverse a carrier means, such as intermediate aprons 22,22', in a reciprocating motion laying the webs 14,14' to form intermediate batts 24,24' on the intermediate aprons 22,22'.
The intermediate batts 24,24' are passed to finisher carding machines 26,26' by intermediate aprons 22,22'.
Carding machines 26,26' produce carded webs 28,28' which are picked up by takeup aprons 30,30' of crosslappers 34,34'.
Crosslappers 34,34' also comprise lapper aprons 32,32' which form a batt of fibers 36 as the lapper aprons 32,32' traverse floor apron 38.
The carded webs 28,28' are laid on floor apron 38 to build up several thicknesses to produce batt 36.
It is pointed out that only a means for forming a batt with the fibers oriented primarily in the fill direction is essential to practice the invention which can be accomplished by any suitable means.
As an example, only one feed means, carding machine, and crosslapper are actually needed to form a batt.
The use of two carding machines such as a breaker carding machine and a finisher carding machine and associated aprons and crosslappers are not essential to practice the invention.
The use of two carding machines tends to open up the fibers better to form a more uniform web and to provide some randomization of the staple fibers forming the webs which form the batt; however, the fibers of batt 36 are still primarily oriented in the fill direction
|
| Related patents |
|
|
Multilayer felt band containing channels produced by exposure to beams of light
I claim: 1. A multilayer felt band comprising fibers of thermoplastic material, at least one layer thereof having storage spaces of the shape of channels defined by ...
|
|
|
Multi-layered circuit board
Having fully described the invention, it is intended that it be limited only by the lawful scope of the appended claims. 1. A layered clad laminate with universal center ...
|
|
|
Resin material in sheet form
As a result of his extensive research, the inventor of this invention has discovered that a sheet of porous resinous material provided therethrough with a multiplicity ...
|
|
|
Weather strip for automobiles
The present invention concerns a weather strip for a vehicle having a body flange, such as around a door of a vehicle to be sealed. The strip is shaped in the form of a ...
|
|
|
Support for tubesheets in hollow fiber permeators
Plates suitable for use as tubesheet supports according to the present invention may be fabricated by rolling up or stacking non-nesting sheets, bonding--if essential ...
|
|
|
Biaxially drawn, filled polyester film substrates
OF THE INVENTION More particularly according to the present invention, the subject films preferably comprise kaolinite and titanium oxide particulates having a mean ...
|
|
|
Method of fabricating two level interconnects and fuse on an IC
The present invention overcomes the problems of the prior art by providing a process incorporating the sputter etch techniques and applying the second layer of contact ...
|
|
|
Process for phosphating asbestos fibers
OF THE INVENTION The phosphorus chlorides which are used as phosphating agent in the present invention are the phosphorus trichloride, phosphorus pentachloride and ...
|
|
|
Television picture tube having a composite frontal pane
In view of the above, it is an object of the invention to provide a television picture tube having a composite frontal pane which provides improved image and viewing ...
|
|
|
Coating composition for metal sheet for two-piece can and metal sheet coated with the composition
OF THE INVENTION Since the metal sheet of the present invention is coated with the above-mentioned specific organic cured film (C), not only the adhesion of the film to ...
|
|
|
Nonmetallic Processes 
