Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3045520 A
Publication typeGrant
Publication dateJul 24, 1962
Filing dateOct 2, 1961
Priority dateOct 2, 1961
Publication numberUS 3045520 A, US 3045520A, US-A-3045520, US3045520 A, US3045520A
InventorsHaruyama Ichizo
Original AssigneeHaruyama Ichizo
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for cutting chemical tows
US 3045520 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

July 24, 1962 lCHlZO HARUYAMA 3,045,520

APPARATUS FOR CUTTING CHEMICAL TOWS 2 Sheets-Sheet 1 Filed Oct. 2, 1961 y 1962 lCHlZO HARUYAMA 3,045,520

APPARATUS FOR CUTTING CHEMICAL wows Filed Oct. 2, 1961 2 Sheets-Sheet 2 ilnited States Patent 3,045,520 APPARATUS FOR CUTTING CHEMICAL TOWS Ichizo Haruyama, 10 Iwaicho Hodogaya-lru, Yokohama, Japan Filed Oct. 2, 1961, Ser. No. 142,400 1 Claim. (Cl. 83201) The present invention relates to apparatus for cutting chemical tows.

The method hitherto employed for cutting chemical tows or continuous chemical sliver is to cut them between rollers. This method, however, is defective in the following points:

(1) Fibers stick fast to each other and dust of fibers'is formed during cutting.

(2) It is extremely difiicult to accurately cut tows into any desired length.

The present invention is designed to eliminate such defects while enabling very simple and accurate adjustment of cutting length of tows as desired.

Acording to the present invention, there is provided an apparatus for cutting chemical tows comprising each 9 several sets of back and front rollers arranged close to each other for conveying a tow therethrough. An endless belt on which many needles are set to extend outwardly obliquely and a band edge are arranged on the upper side of and close to the path of tow between the sets of back and front rollers.

The endless belt slowly proceeds at right angles to the direction in which the tow is conveyed, while the band edge runs at high speed in a direction opposite to that of a the endless belt. The tow is thus cut with the high speed band edge as soon as it is taken up by the obliquely set needles.

The above and other objects, features and advantages will be apparent from the following description when read with reference to the accompanying drawings which illustrates one preferred embodiment of the invention.

In the drawings:

FIG. 1 is a side elevation showing the roller arrangement of the embodiment including back and front rollers;

FIG. 2 is an enlarged fragmentary perspective view showing the cutting mechanism of the apparatus;

FIGS. 3, 4 and 5 are a front view, and leftand righthand side views of the same.

In the drawings, numerals '1 and 2 designate back bottom rollers and numeral 3 designates a back top roller. A front bottom roller 4, a middle bottom roller 5 and. a front top roller '6 are suitably disposed adjacent to the back rollers 1, 2 and 3. Top and bottom feed rollers 7 and 8 are disposed rearwardly of the back rollers and a chemical tow 9 is fed between the feed rollers 7 ice and 8 in the direction indicated at A in FIG. 1 at a proper speed. To facilitate tow cutting operation, draft is applied to the tow between the front and back rollers thereby to run the two in tension.

An endless belt 10 and a band edge 11 are arranged between the front top roller 6 and the back top roller 3 and immediately above the path of the tow 9. The endless belt runs very slowly in a direction at rig-ht angles to the direction in which the tow 9 proceeds, as indicated by the arrow in FIG. 2. A multiplicity of substantially equally spaced apart needles 12 are set on the endless belt so as to extend outwardly obliquely. The needles 12 act to take up the tow as the belt runs.

The band edge 11 is disposed immediately behind the endless belt 10 and in operation runs at high speed in a direction opposite to that in which the endless belt runs to cut the tow 9 as taken up by the needles 12. It will be observed that the locus of the cut point forms the oblique line of a right-angled triangle having two sides corresponding to the progress of the tow 9 and the needles 12, respectively.

Numeral 13 designates mating bevel gears and numerals 14 and 15 designate support brackets for belt pulleys on opposite sides. Numeral 16 designates support legs of the apparatus. The bevel gear 13 is driven by a shaft 17 as shown.

It will be appreciated from the foregoing that the cutting operation can be effected accurately andrapidly without giving rise to any miscut or short cut. Thus, the tow is cut verysharply preventing sticking together of tow fibers and dust formation at the cutting region. The fiber bundles out according to the invention may readily be formed into slivers as required. It will also be appreciated that the length of cut fibers obtained may be freely controlled by changing the ratio of the surface speed of the back rollers and that of the endless belt.

What is claimed is:

Anapparatus for cutting chemical tows comprising a roller arrangement including a set of back rollers and a set of front rollers for advancing a chemical tow in one direction, an endless belt having thereon a multiplicity of spaced-apart needles extending outwardly obliquely with respect to the belt and arranged between the set of back rollers and the set of front rollers so as to travel slowly in a direction at right angles to the direction in which the tow is advanced, and a band edge disposed immediately behind said endless belt and adapted to run at high speed in a direction opposite to the direction in which said endless belt travels, whereby the tow as taken up by said needles on the endless belt is effectively cut by said band edge.

No references cited.

Non-Patent Citations
1 *None
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6196104Apr 23, 1998Mar 6, 2001Premark Rwp Holdings, Inc.Apparatus for producing sheets of solid surfacing
US6892617 *Jan 28, 2000May 17, 2005Hobas Engineering GmbhFeeding arm
US7691223 *Jan 25, 2007Apr 6, 2010Ford Global Technologies, LlcApparatus and method for making fiber reinforced sheet molding compound
US20080178985 *Jan 25, 2007Jul 31, 2008Ford Global Technologies, LlcApparatus and method for making fiber reinforced sheet molding compound
U.S. Classification83/732, 83/788, 83/567, 83/424, 83/436.3, 83/913
International ClassificationD01G1/04
Cooperative ClassificationD01G1/04, Y10S83/913
European ClassificationD01G1/04