US2947038A - Drawing devices operating with an upper belt - Google Patents

Drawing devices operating with an upper belt Download PDF

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Publication number
US2947038A
US2947038A US467526A US46752654A US2947038A US 2947038 A US2947038 A US 2947038A US 467526 A US467526 A US 467526A US 46752654 A US46752654 A US 46752654A US 2947038 A US2947038 A US 2947038A
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US
United States
Prior art keywords
roller
belt
pressure
apron
tensioning member
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
Application number
US467526A
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English (en)
Inventor
Josef Pfenningsberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Josef Pfenningsberg & Co
Original Assignee
Josef Pfenningsberg & Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Josef Pfenningsberg & Co filed Critical Josef Pfenningsberg & Co
Application granted granted Critical
Publication of US2947038A publication Critical patent/US2947038A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons

Definitions

  • the known upper belt drafting devices require special careful handling, when it is a question of working up different kinds, quantities and lengths of fibres; For dealing with such a case, it has been proposed to adjust by hand the apron tensioning member together with the pressure-applying roller to a variable distance or a variable position with respect to the lower cylinder. It will be obvious, that in practical operation it will be impossible to be sure of this fine adjustment at the many thousands of spinning places in question.
  • the illustration shows a single upper belt or apron unit with the appertaining pressure-applying arrangements.
  • the travel and the posi-l In the constructural example shown are to be seen at 1 the apron tensioning member in the form of a direction-changing rail, at 2 a loading compression spring acting in the direction of the drafting field plane.
  • the second pressure-applying spring which acts on the tensioning member 1, independently of the first-named spring 2.
  • the recess 4 in the supporting head 5 is under the influence of the loading compression spring 2.
  • 6 is the small belt or apron.
  • 7 is the lower roller and 8 indicates the locus of the variable clamping or the clamping zone, from which the bundle of fibres emerges.
  • a loading compression spring 9 provides pressure for roller 10 against roller 7, the latter being known per se.
  • springs 2 and 9 are housed together with the associated supporting heads 5 and ill and the associated sheathlike parts 12 and 13 in a common casing 14.
  • the sheath-like parts 12 and 13 each form a unit with the supporting head.
  • At .15 and 16 are seen guiding pins for guiding and retaining the supporting heads in the I casing.
  • the guiding pin l6 runs with clearance in the slot 17, while the square pin 15 is guided positively without clearance in the slot 18. This provides, that the supporting head 11 and the associated pressure roller 10 are always held axis parallel with respect to the bottom cylinder 7, while the said pins 15 and :16 also act as holding means, when the system is being unmounted.
  • the contact pressure force ratio the contact pressure force of the spring 9 is the greatest.
  • the contact pressure force 2 is weaker and that of the spring 3 is still weaker.
  • the magnitude of the contact pressure forces should be so selected that, as initially stated, the most favourable drawing out results will be obtained.
  • the member 1 ' is convex in cross-section at. the contact surface, While the recess in supporting head 5 is of more or less trapezoidal crosssection. The parts will thus bear in all positions without seizing. l
  • the sheath-like form of the supporting heads engaging in'the casing has a further special advantage, namely, that the pressure-applying springs are housed in a dustproof manner. This greatly helps to preserve the springs (protection against corrosion and so forth).
  • the arrangement according to the invention operates as follows:
  • the fibre roving entering in the direction of the arrow A is gripped between the belt 6 and the bottom roller 7 at B and is carried along to the gripping zone 8 with a yielding, gradually decreasing contact pressure.
  • the decrease in the contact pressure results from the circumstance, that the greatest contact pressure is exerted by spring 9, while weaker contact pressures are transmitted by springs 2 and 3.
  • the fibre roving leaves the system at 8 and is carried along by the next following system in the direction of the arrow C.
  • the two load-applying compression apron tensioning member 1 is, as is known, acted upon by only one spring 2, whose direction of pressure runs parallel with the effect of spring 9 for the upper pressure roller 10. From this follows that the loading of the tensioning member 1 consists of two components, of which one runs in the direction of apron 6, while the other acts perpendicularly to the apron. This results in:
  • the component here present also results in a component in the direction of the lower belt roving and a component perpendicularly to the belt.
  • the added spring force which acts upon the tensioning member has an effect opposing that component of the spring loading the apron tensioning member which acts in the direction of the belt, so that an added tensioning of the belt does not occur, or at least only to a very minor degree.
  • the contact pressure of the belt with its disadvantageous results for the quality of the fibers is eliminated in the apparatus according to the invention. Only the increase of the clamping effect between the tensioning member and the lower roller remains.
  • the automatic effect of the new apparatus is explained in that the roving becomes stronger if there is a large number of sho1t fibers present in the roving cross section which can no longer 'be held by the feed roller pair 7, 10, whereby the tensioning member is lifted and that part of the'eifect of the spring 3 which acts in the direction toward the clamping point between the tensioning member and the lower roller is magnified, so that the short fibers are being braked more, so that they cannot be pulled out so rapidly by the draw-E roller pair.
  • the reverse is true if the proportion of short fibers in the roving cross section decreases. In that case, the clamping pressure between the tensioning member and the lower roller is reduced, and the short fibers can follow more easily the pull of the draw-off rollers.
  • a single belt drawing device for spinning machinery comprising a lower drafting roller, an upper drafting roller and a belt surrounding said upper roller, belt tensioning means mounted above said lower roller and lying within said belt, independent parallel guides positioned above said lower roller, firstandsecond supporting heads said lower drafting roller to exert radial pressure on said having recesses and mounted on said parallel guides to hold said upper roller and said belt tensioning means respectively in parallelism with said lower roller, resilient means biasing each of said supporting heads downwardly, said belt tensioning means comprising a rail, the upper edge of which seats in a recess in said second supporting head and the lower edge extends angularly downwardly, and a downwardly extending spring mounted on said second supporting head to bear on the lower edge of said rail to bias said lower edge substantially radially toward belt against said lower drafting roller.
  • An apparatus for drafting slivers for the production of spun yarn comprising an upper and a lower drafting roller, a first resilient means for rotatably supporting said upper roller to guide and to press said upper roller toward said lower roller, an endless band around said upper roller of substantially greater circumference than said upper roller, band tightening means in the form of a fiat rail disposed generally tangentially of said lower roller within said band, second resilient means engaging one edge of said flat rail to press said edge in a direction parallel to said first resilient means, and third resilient means to press the other edge of said rail generally radially toward said lower roller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
US467526A 1953-11-12 1954-11-08 Drawing devices operating with an upper belt Expired - Lifetime US2947038A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP10805A DE961692C (de) 1953-11-12 1953-11-12 Oberriemchen-Durchzugstreckwerk fuer Spinnmaschinen

Publications (1)

Publication Number Publication Date
US2947038A true US2947038A (en) 1960-08-02

Family

ID=7363118

Family Applications (1)

Application Number Title Priority Date Filing Date
US467526A Expired - Lifetime US2947038A (en) 1953-11-12 1954-11-08 Drawing devices operating with an upper belt

Country Status (4)

Country Link
US (1) US2947038A (da)
DE (1) DE961692C (da)
FR (1) FR1112605A (da)
GB (1) GB772812A (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499191A (en) * 1967-12-08 1970-03-10 Casablancas Ltd Top arms for textile fibre roller drafting mechanisms

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1114417B (de) * 1958-03-31 1961-09-28 Wuerttembergische Spindelfabri Doppelriemchenstreckwerk fuer Spinnereimaschinen
DE1137362B (de) * 1960-03-03 1962-09-27 Ernst Toenniessen Doppelriemchenstreckwerk fuer Spinnmaschinen
DE1200179B (de) * 1962-03-17 1965-09-02 Skf Kugellagerfabriken Gmbh Doppelriemchen-Streckwerk fuer Spinnereimaschinen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2025394A (en) * 1934-01-19 1935-12-24 Langen Erich Cotton drawing frame
US2209573A (en) * 1938-02-17 1940-07-30 Louie Ban Lem Drawing mechanism for spinning frames and the like
US2332973A (en) * 1940-07-01 1943-10-26 Louie Ban Lem Drawing mechanism for spinning frames and the like
US2708290A (en) * 1951-11-30 1955-05-17 Skf Kugellagerfabriken Gmbh Double belt drawing mechanism
US2751631A (en) * 1951-02-28 1956-06-26 Textile drafting apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR651561A (da) * 1928-02-17 1929-02-20
DE540243C (de) * 1928-03-05 1931-12-12 Josef Pilz Durchzugsstreckwerk fuer Spinnereimaschinen
DE883107C (de) * 1941-04-01 1953-07-13 Mann Chr Streckwerk, insbesondere fuer Vorspinnmaschinen
DE976037C (de) * 1949-07-19 1963-01-24 Denkendorf Forschungsgesellsch Doppelriemchen-Streckwerk

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2025394A (en) * 1934-01-19 1935-12-24 Langen Erich Cotton drawing frame
US2209573A (en) * 1938-02-17 1940-07-30 Louie Ban Lem Drawing mechanism for spinning frames and the like
US2332973A (en) * 1940-07-01 1943-10-26 Louie Ban Lem Drawing mechanism for spinning frames and the like
US2751631A (en) * 1951-02-28 1956-06-26 Textile drafting apparatus
US2708290A (en) * 1951-11-30 1955-05-17 Skf Kugellagerfabriken Gmbh Double belt drawing mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499191A (en) * 1967-12-08 1970-03-10 Casablancas Ltd Top arms for textile fibre roller drafting mechanisms

Also Published As

Publication number Publication date
DE961692C (de) 1957-04-11
FR1112605A (da) 1956-03-16
GB772812A (da) 1957-04-17

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