US3071824A - Drafting mechanism for textile spinning machines - Google Patents
Drafting mechanism for textile spinning machines Download PDFInfo
- Publication number
- US3071824A US3071824A US3071824DA US3071824A US 3071824 A US3071824 A US 3071824A US 3071824D A US3071824D A US 3071824DA US 3071824 A US3071824 A US 3071824A
- Authority
- US
- United States
- Prior art keywords
- drafting
- roller
- spinning machines
- rollers
- flutes
- 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
- 238000009987 spinning Methods 0.000 title description 10
- 239000004753 textile Substances 0.000 title description 10
- 239000002657 fibrous material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
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
Definitions
- Spinning machines with drafting or grooved rollers which have asymmetrically profiled grooves are already known, but with these rollers a bottom belt of the machine has been looped about the relevant roller and the asymmetrical profile has been provided for the purpose of improving the entrainment of a top roller bearing against the belt. Moreover, it has already been proposed to .provide asymmetrically profiled grooving on drafting rollers which each co-.operate with a sliding weighting member adapted in shape thereto.
- a ⁇ drafting roller wh-ich is arranged in a drafting zone and is in contact with the fibrous material, with -grooving orientated in a direction opposite to the direction of action of the drafting force. In this way, the material is better held back than by the conventional arrangements.
- FIG. 1 illustrates a drafting zone of a drafting mechanisrn
- IFIG. 2 is a view on a larger scale, ⁇ of the groot/ing of a delivery roller in the drafting zone illustrated in F-IG. 1.
- FIGURE l illustrates adrafting zone which is bounded by the nips between a rapidly rotating pair of draft-ing rollers 1, 2 and a slowly rotating pair of drafting rollers 3, l4.
- l'The lower drafting rollers 2 and 4 are provided with asymmetric grooving.
- iT he nip between the rollers 41 and 2 is shown on a larger scale in FIG. 2.
- f'llwo radii S and S extending from the centre of the roller 2 are drawn through bottom corners 5 40 and 6, respectively, of an individual groove or flute 7.
- the adjoining Walls of the groove 7 are inclined at angles a and with respect to the radii S and S', respectively.
- the angle a is greater than ,8, i.e. the rear wall 9 is substantially radial whereas the forward wall 8 is inclined forwardly with respect to the direction of circumferential movement of the rollers 2. The result is that the grooving is forwardly inclined or orientated in the direction of rotation of the roller.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Description
Jan. 8, 1963 K. EBERLE 3,071,824
DRAFTING MECHNISM FOR TEXTILE SPINNING MACHINES Filed April 20, 1959 INVENTOR. Ko/vR/w 55ML:
f ATTORNEY Patented Jan. 8, 1963 3,071,824 DRAFTING MECHANISM FOR TEXTILE SPINNING MACHINES Konrad Eberle, Flums, Switzerland Filed Apr. 20, 1959, Ser. No. 807,358 Claims priority, application Switzerland Apr. 21, 1958 1 Claim. (Cl. 19-258) The present invent-ion relates to drafting mechanisms for textile spinning machines.
Spinning machines with drafting or grooved rollers which have asymmetrically profiled grooves are already known, but with these rollers a bottom belt of the machine has been looped about the relevant roller and the asymmetrical profile has been provided for the purpose of improving the entrainment of a top roller bearing against the belt. Moreover, it has already been proposed to .provide asymmetrically profiled grooving on drafting rollers which each co-.operate with a sliding weighting member adapted in shape thereto.
According to the present invention there is provided a `drafting roller, wh-ich is arranged in a drafting zone and is in contact with the fibrous material, with -grooving orientated in a direction opposite to the direction of action of the drafting force. In this way, the material is better held back than by the conventional arrangements.
An embodiment of the invention will be explained with reference to the accompanying drawings in which:
FIG. 1 illustrates a drafting zone of a drafting mechanisrn, and
IFIG. 2 is a view on a larger scale, `of the groot/ing of a delivery roller in the drafting zone illustrated in F-IG. 1.
FIGURE l illustrates adrafting zone which is bounded by the nips between a rapidly rotating pair of draft-ing rollers 1, 2 and a slowly rotating pair of drafting rollers 3, l4. l'The lower drafting rollers 2 and 4 are provided with asymmetric grooving.
iT he nip between the rollers 41 and 2 is shown on a larger scale in FIG. 2. f'llwo radii S and S extending from the centre of the roller 2 are drawn through bottom corners 5 40 and 6, respectively, of an individual groove or flute 7. The adjoining Walls of the groove 7 are inclined at angles a and with respect to the radii S and S', respectively. The angle a is greater than ,8, i.e. the rear wall 9 is substantially radial whereas the forward wall 8 is inclined forwardly with respect to the direction of circumferential movement of the rollers 2. The result is that the grooving is forwardly inclined or orientated in the direction of rotation of the roller. Since the rollers 1 and 2 rotate faster than the rollers 3 and 4, the rather steep rear Walls 9 of the flutes produce a relatively firm grip on the fibrous material whereas the inclined forward walls 8 of the flutes afford a smooth release or disengagement of the material from the grooves 7. In the case of the entry or feed roller 4, the fluting must, as shown in FIG. 1, be orientated in the direction opposite to the direction of rotation, in order that it will be in opposition to the direction of action of the drafting force in the drafting zone.
What is claimed is:
In a textile drafting arrangement, a forward drafting roller, a rearward `drafting roller spaced from said forward drafting roller, and a pressure roller cooperating with each of said drafting rollers to form two spaced nips of a drafting zone, said drafting rollers being axially iluted, the flutes of the forward drafting roller having a rear wall with respect to the direction of the circumferential movement of the -utes, said rear wall being substantially radial, the flutes of the forward drafting roller having a forward wall which is forwardly inclined with respect to Ithe direction of the circumferential movement of the flutes, the flutes of the rearward drafting roller having a forward wall with respect to the direction of the circumferential movement of the flutes, said forward wall being substantially radial, the flutes of the rearward drafting roller having a rear Wall which -is rearwardly inclined with respect to the circumferential movement of the flutes.
References Cited in the tile of this patent UNITED STATES PATENTS
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3071824A true US3071824A (en) | 1963-01-08 |
Family
ID=3451157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US3071824D Expired - Lifetime US3071824A (en) | Drafting mechanism for textile spinning machines |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3071824A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4112548A (en) * | 1975-09-23 | 1978-09-12 | Joseph Sauvage | Drafting machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US391172A (en) * | 1888-10-16 | Corn-husking machine | ||
| US1994174A (en) * | 1933-03-07 | 1935-03-12 | Fossel Joseph | Feed or drawing roller for textile machines |
-
0
- US US3071824D patent/US3071824A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US391172A (en) * | 1888-10-16 | Corn-husking machine | ||
| US1994174A (en) * | 1933-03-07 | 1935-03-12 | Fossel Joseph | Feed or drawing roller for textile machines |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4112548A (en) * | 1975-09-23 | 1978-09-12 | Joseph Sauvage | Drafting machine |
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