US2302126A - Drawing roll and cot for such rolls - Google Patents
Drawing roll and cot for such rolls Download PDFInfo
- Publication number
- US2302126A US2302126A US353859A US35385940A US2302126A US 2302126 A US2302126 A US 2302126A US 353859 A US353859 A US 353859A US 35385940 A US35385940 A US 35385940A US 2302126 A US2302126 A US 2302126A
- Authority
- US
- United States
- Prior art keywords
- rolls
- cot
- roll
- drawing roll
- polyvinyl alcohol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N butyric aldehyde Natural products CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 24
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N valeric aldehyde Natural products CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 description 16
- 229920005989 resin Polymers 0.000 description 15
- 239000011347 resin Substances 0.000 description 15
- 239000004372 Polyvinyl alcohol Substances 0.000 description 13
- 229920002451 polyvinyl alcohol Polymers 0.000 description 13
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 12
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 9
- 229920002554 vinyl polymer Polymers 0.000 description 9
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 8
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 7
- 239000007795 chemical reaction product Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- JARKCYVAAOWBJS-UHFFFAOYSA-N hexanal Chemical compound CCCCCC=O JARKCYVAAOWBJS-UHFFFAOYSA-N 0.000 description 6
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- 239000010985 leather Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 150000001299 aldehydes Chemical class 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920002689 polyvinyl acetate Polymers 0.000 description 2
- 239000011118 polyvinyl acetate Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 1
- 125000003172 aldehyde group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 125000005498 phthalate group Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/70—Constructional features of drafting elements
- D01H5/74—Rollers or roller bearings
- D01H5/80—Rollers or roller bearings with covers; Cots or covers
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H2700/00—Spinning or twisting machines; Drafting devices
- D01H2700/245—Conception or fabrication of drafting cylinders
Definitions
- This invention relates to drawing rolls of the type used in the textile industry for working flbrous sliver, roving, or partly finished yarns and thread in spinning and twisting machines. Such drawing rolls are arranged in series of two or more pairs, each pair being constituted by a positively driven fluted steel roll and an idle roll having a yieldable frictional surface, which is usually located above and pressed against the fluted roll.
- the rolls containing the-improvement of this invention are designed to be used as the yieldable or top rolls of the drawing frame.
- the object of this invention is to furnish a drawing roll, and cots or coverings for drawing rolls, which are more durable than leather, have flexibility and a coefficient of friction equal or superior to the best of the rolls and roll coverings heretofore known, and retain these qualities substantially unaffected throughout the ranges of temperature encountered in artificially heated textile mills during the coldest winter weather of the north temperate latitudes.
- the invention consists in the combination of a drawing roll core of any usual or desired construction and design and a covering of a vinyl resin compound having the chemical and physical characteristics later described. It further consists of a cot or covering adapted to be applied to drawing roll cores made, wholly or at least as to its outermost parts, of the same compound.
- FIG. 1 is an elevation and partial section of a drawing roll, showing the resin covering in section and the core in elevation;
- Fig. 2 is a perspective view of a cot embodying one phase of the invention adapted to be applied to a drawing roll core;
- Fig. 3 is a diagrammatic representation of a conventional set of drawing rolls in which the upper rolls contain the present invention.
- a. represents a drawing roll core of common design and h represents a covering, shell or jacket of vinyl resin thereon.
- c is a tube or cot of the same material adapted to be applied to a drawing roll core in the relation of the cover b shown in Fig. l and to be purveyed as an article of manufacture for application to drawing rolls.
- d represents the fluted positively driven rolls of a drawing frame and ab represents upper rolls embodying the invention.
- the vinyl resin compound of which the cots and jackets of this invention are made is a reaction product of polyvinyl alcohol with one of the aldehydes of the group consisting of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde and valeraldehyde.
- aldehydes of the group consisting of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde and valeraldehyde.
- formaldehyde known commercially as Formvar
- butyraldehyde known commercially as Butvar
- Formvar is the preferred one of these two.
- the cots or sheaths made of the resins herein defined are sufllciently flexible and resilient to coact with the fluted metal rolls of drawin frames in gripping fibers firmly, but without cutto exact dimensions and to v face texture.
- Such cots do not accumulate static electricity in any degree commensurate with leather or rubber, and so enables fibers to be satisfactorily spun under conditions where spinning is all but impossible with the use of rubber-covered or product of polyvinyl alcohol with one of the substances in the group consisting of formaldehyde. acetaldehyde, propionaldehyde, butyraldehyde. valeraldehyde and hexaldehyde.
- a cot or covering for drawing rolls having its outermost portion at least composed of a vinyl resin, the reaction product of polyvinyl alcohol with one ofthe substances in the group consisting .of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, valeraldehyde and hexaldehyde.
- the said resins may be combined with any of the water insoluble plasticizers known to be asslmilable with these resins, in any degree to give a desired quality of softness and flexibility.
- a drawing roll having a flexible, resilient coveringcomposed of a vinyl resin, the reaction product of polyvinyl alcohol with one oi the substances in the group consisting of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde. valeraldehyde and hexaldehyde, said covering having flexibility, resilience and gripping capacity in substantially equal measure throughout the temperature range from about F. to about F; s
- a cot or covering for drawing rolls having its outermost portion at least composed of a vinyl resin, the reaction product of polyvinyl alcohol with one o! the substances in the group consisting of formaldehyde, acetaldehyde,
- propionaldehyde, butyraldehyde, valeraldehyde and hexaldehyde said covering having flexibility. resilience and gripping capacity in substantially equal measure throughout the temperature range from about 50 F. to about 150* F.
- a drawing roll having a flexible, resilient covering composed of a reaction product resulting from hydrolysis of polyvinyl acetate to polyvinyl alcohol, and the reaction of hydrorwl groups of polyvinyl alcohol with one of the substances in the group consisting of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, valeraldehyde and hexaldehyde.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Description
Nov. 17, 1942. v J. A. KENNEDY, JR 2,302,126
DRAWING ROLL AND COT FOR SUCH ROLLS.
Filed Aug. 23 1940 J v [WW5 W fizz Patented Nov. 17, 1942 DRAWING ROLL AND COT FOR SUCH ROLLS John A. Kennedy, Jr., Portland, Maine, assignor of one-third to Harold S. Richards and onethird to Walter Winchenbaoh, both of South Portland, Maine Application August 23, 1940, Serial No. 353,859
6 Claims. (Cl. 19-142) This invention relates to drawing rolls of the type used in the textile industry for working flbrous sliver, roving, or partly finished yarns and thread in spinning and twisting machines. Such drawing rolls are arranged in series of two or more pairs, each pair being constituted by a positively driven fluted steel roll and an idle roll having a yieldable frictional surface, which is usually located above and pressed against the fluted roll.
The rolls containing the-improvement of this invention are designed to be used as the yieldable or top rolls of the drawing frame.
Many attempts have been made in recent years to provide drawing rolls of this character with a surface which is more durable and permanent in its characteristics than the leather coverings previously used. Such efforts have met with varying degrees of success but all, to the best of my knowledge and belief, have left something to be desired. A serious defect of some of these roll surfaces or coverings is that they are affected by low temperature so that they become hard and lose the frictional quality necessary for drawing the fibers and yarns, when chilled to temperatures materially lower than those prevailing in spinning rooms. Thus, for instance in mills which are operated only during the daytime and are shut down at night, the night temperature in cold weather usually drops considerably below 60, that is, to temperatures which cause the rolls of the character last referred to to become hard and fail to work properly. After being thus chilled, they do not become eflicient until warmed to nearly the operating temperature of the spinning room after the mill has been started up in the morning. This may require several hours to accomplish, and results in loss of production or the making of inferior yarns, or both, during the warming up period.
The object of this invention is to furnish a drawing roll, and cots or coverings for drawing rolls, which are more durable than leather, have flexibility and a coefficient of friction equal or superior to the best of the rolls and roll coverings heretofore known, and retain these qualities substantially unaffected throughout the ranges of temperature encountered in artificially heated textile mills during the coldest winter weather of the north temperate latitudes.
The invention consists in the combination of a drawing roll core of any usual or desired construction and design and a covering of a vinyl resin compound having the chemical and physical characteristics later described. It further consists of a cot or covering adapted to be applied to drawing roll cores made, wholly or at least as to its outermost parts, of the same compound.
The drawing illustrates conventionally such a drawing roll and cot; and therein- Fig. 1 is an elevation and partial section of a drawing roll, showing the resin covering in section and the core in elevation;
Fig. 2 is a perspective view of a cot embodying one phase of the invention adapted to be applied to a drawing roll core;
Fig. 3 is a diagrammatic representation of a conventional set of drawing rolls in which the upper rolls contain the present invention.
In Fig. l, a. represents a drawing roll core of common design and h represents a covering, shell or jacket of vinyl resin thereon. In Fig. 2, c is a tube or cot of the same material adapted to be applied to a drawing roll core in the relation of the cover b shown in Fig. l and to be purveyed as an article of manufacture for application to drawing rolls. In Fig. 3, d represents the fluted positively driven rolls of a drawing frame and ab represents upper rolls embodying the invention.
The vinyl resin compound of which the cots and jackets of this invention are made is a reaction product of polyvinyl alcohol with one of the aldehydes of the group consisting of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde and valeraldehyde. Of these compounds the ones resulting from the reaction of formaldehyde (known commercially as Formvar) and butyraldehyde (known commercially as Butvar) are preferred to the others; and Formvar is the preferred one of these two.
These products are made by hydrolyzing polyvinyl acetate, with substitution of hydrogen atoms for acetyl groups of the long-chain acetate molecules, to produce polyvinyl alcohol. The reaction of formaldehyde with the hydroxyl groups of polyvinyl alcohol produces Formvar, with elimination of water. The similar reaction of butyraldehyde results in the production of Butvar; and the other aldehydes in the group above named react in similar fashion with polyvinyl alcohol to form analogous products. These reaction products are thermoplastic. They differ from polyvinyl alcohol in being insoluble in water, but are soluble in a number of organic solvents, including the organic phthalates, aromatic phosphateaetc, which serve as plasticizers.
The cots or sheaths made of the resins herein defined are sufllciently flexible and resilient to coact with the fluted metal rolls of drawin frames in gripping fibers firmly, but without cutto exact dimensions and to v face texture.
ting or breaking the fibers. At the same time they are firm and hard enough to grip and draw the fibers without slipp ng. Their 'emciency in these respects is substantially uniform throughout a temperature range of from near zero degrees F. to 150 degrees F. Within that range the resin can be distorted and it returns by its natural resilience to the previous shape after removal of the distorting force. It is'wear resisting, and cots made of it resist the abrasion and wear of the threads, rovings and fibers passing successively between pairs of drawing rolls which are driven at diilerent rates of speed.
Such cots do not accumulate static electricity in any degree commensurate with leather or rubber, and so enables fibers to be satisfactorily spun under conditions where spinning is all but impossible with the use of rubber-covered or product of polyvinyl alcohol with one of the substances in the group consisting of formaldehyde. acetaldehyde, propionaldehyde, butyraldehyde. valeraldehyde and hexaldehyde.
2. A cot or covering for drawing rolls having its outermost portion at least composed of a vinyl resin, the reaction product of polyvinyl alcohol with one ofthe substances in the group consisting .of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, valeraldehyde and hexaldehyde.
3. A drawing roll having aiflexible. resilient covering composed of a vinyl resin. the reaction leather-covered rolls. In the'solid state this material can be cut by cutting tools to prescribed forms and dimensions, and buffed by abrasives produce a desired sur- Masses of the resin maybe molded directly on the drawing roll cores, or the coverings may be built up by wrapping the resin in sheet form around the core and fusing the wrappings together by heat and pressure. Separate cots may be made in the same way, and also by extrusion,
and-applied to drawing roll cores, being made fast if desired by cement or otherwise.
The foregoing description of physical characteristics applies to both Formvar and Butvar. The qualities described are valuable and important in drawing roll cots and covers. These desirable qualities exist in greater measure in Formvar than in Butvar, wherefore I prefer this composition to all others. However, I do not limit my protection to that specific compound, but include all'others of the aldehyde group of vinyl resins.
The said resins may be combined with any of the water insoluble plasticizers known to be asslmilable with these resins, in any degree to give a desired quality of softness and flexibility.
What I claim and desire to secure by Letters Patent is:
1. A drawing roll having a flexible, resilient coveringcomposed of a vinyl resin, the reaction product of polyvinyl alcohol with one oi the substances in the group consisting of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde. valeraldehyde and hexaldehyde, said covering having flexibility, resilience and gripping capacity in substantially equal measure throughout the temperature range from about F. to about F; s
4. A cot or covering for drawing rolls having its outermost portion at least composed of a vinyl resin, the reaction product of polyvinyl alcohol with one o! the substances in the group consisting of formaldehyde, acetaldehyde,
propionaldehyde, butyraldehyde, valeraldehyde and hexaldehyde, said covering having flexibility. resilience and gripping capacity in substantially equal measure throughout the temperature range from about 50 F. to about 150* F.
5. A drawing roll having a flexible, resilient covering composed of a reaction product resulting from hydrolysis of polyvinyl acetate to polyvinyl alcohol, and the reaction of hydrorwl groups of polyvinyl alcohol with one of the substances in the group consisting of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, valeraldehyde and hexaldehyde.
6. A cot or covering for drawing rolls of which at least the outermost portion is composed of a reaction product resulting from hydrolysis of polyvinyl actat to polyvinyl alcohol, and the reactionrof hydroxyl groups of polyvinyl alcohol withone of the substances in the group consisting of formaldehyde, acetaldehyde, proplonaldehyde, butyraldehyde, valeraldehyde and hexaldehyde.
l. JOHN A. KENNEDY, Ju.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US353859A US2302126A (en) | 1940-08-23 | 1940-08-23 | Drawing roll and cot for such rolls |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US353859A US2302126A (en) | 1940-08-23 | 1940-08-23 | Drawing roll and cot for such rolls |
Publications (1)
Publication Number | Publication Date |
---|---|
US2302126A true US2302126A (en) | 1942-11-17 |
Family
ID=23390887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US353859A Expired - Lifetime US2302126A (en) | 1940-08-23 | 1940-08-23 | Drawing roll and cot for such rolls |
Country Status (1)
Country | Link |
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US (1) | US2302126A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2996646A (en) * | 1957-01-09 | 1961-08-15 | Eastman Kodak Co | Antistatic device |
US3246372A (en) * | 1962-04-10 | 1966-04-19 | Maremont Corp | Drafting rollers for spinning and like machines |
US3722050A (en) * | 1970-11-16 | 1973-03-27 | Speed O Print Business Machine | Rollers |
-
1940
- 1940-08-23 US US353859A patent/US2302126A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2996646A (en) * | 1957-01-09 | 1961-08-15 | Eastman Kodak Co | Antistatic device |
US3246372A (en) * | 1962-04-10 | 1966-04-19 | Maremont Corp | Drafting rollers for spinning and like machines |
US3722050A (en) * | 1970-11-16 | 1973-03-27 | Speed O Print Business Machine | Rollers |
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