US2686938A - Noguera - Google Patents

Noguera Download PDF

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Publication number
US2686938A
US2686938A US2686938DA US2686938A US 2686938 A US2686938 A US 2686938A US 2686938D A US2686938D A US 2686938DA US 2686938 A US2686938 A US 2686938A
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Prior art keywords
platform
nip
belt
runs
positive
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    • 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
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • D01H5/88—Cradles; Tensors

Definitions

  • This invention relates to drafting apparatus for textile fibres of the kind in which the fibres are caused to pass between and are controlled by adjacent runs of two endless belts or bands, arranged to form elongated loops and superposed one above the other, the loops being supported. at their rear ends by rollers which interact to form a positive nip between the said adjacent runs and which are arranged to drive the loops in the direction of feed of the fibres, and the loops being supported at their forward or front ends by means of a tensor carried by a cradle, the tensor being arranged to form a delivery nip between the runs which is located very close to a further positive nip formed between a following pair of drafting rollers.
  • positive nip as used herein means a hip which exerts a substantially non-yielding grip on the fibres as opposed to the soft yielding grip of the delivery nip between the endless belts.
  • the foregoing arrangement is in accordance with the standard two-belt apparatus used in the well known Casablancas Drafting System.
  • the maximum length of the fibre-controlling belt runs must, of necessity, be limited owing mainly to the fact that the said runs are, in efiect, propelled forward towards the tensor from the rear by the driving rollers and therefore, if the belt runs are too long, they will tend to deform and cease to exercise proper fibre control.
  • the length of these belt runs depends upon the distance apart of the two positive nips as aforesaid which are formed respectively between the belt-supporting rollers and the succeeding drawing rollers, the positive nip between the succeeding drawing rollers having in any case to be close to the delivery nip of the belts because, if this distance greatly exceeds the length of the shortest fibres being drawn, the control exercised on these fibres again will not be satisfactory.
  • the two positive nips immediately receding and immediately succeeding the delivery nip must be at a distance apart at least a little greater than the length of the longest fibres being drawnsince otherwise such fibres will be positively gripped at each end during the drawing operation and the soft yielding delivery control exercised by the belts will be largely ineffective as far as the fibres so gripped are concerned. It should be pointed out that one way of reducing the risk of the fibre-controlling belt runs undulating or becoming unsteady when they are longer than normal is to mount them relatively taut. This, however,
  • the length of the fibre-controlling belt runs which has been adopted in the standard Casablancas apparatus is such that the distance between the positive nip formed by the belt-supporting rollers and the positive nip formed by the succeeding drawing rollers is only some 1%". This permits the very satisfactory drafting of fibres such as cotton, with lengths ranging up to a maximum of about 1%.
  • a main object of the present invention is to provide a generally improved drafting apparatus of the kind specified which is capable of dealing satisfactorily with a much wider range of fibre lengths than has been possible heretofore in any one apparatus.
  • a drafting apparatus of the kind specified there is provided means, including at least one platform member, for supporting the fibre-controlling belt runs and for determining the distance apart of the positive nips which respectively immediately precede and immediately succeed the delivery nip, said means being carried on the cradle and being arranged to act 011 the imier surface of the lower fibre-controlling belt run to provide said support and to determine said distance.
  • This arrangement permits the use of belts, the fibre-controlling runs of which are considerably longer than those normally used whilst the distance apart of the positive nips immediately preceding and immediately succeeding the delivery nip of the belts can be varied according to the maximum length of the fibres being drawn.
  • Figure 1 is a part-sectional side elevation illustrating the relevant portions of a drafting apparatus and showing one embodiment of the means according to the invention in the operative position,
  • Figure 2 is a sectional side elevation of the means shown in Figure 1, parts of the co-operating belts being inserted in chain-dotted lines.
  • FIG. 3 is a front elevation according to Figure 2
  • Figures 4 and 5, 6 and '7, and 8 and 9, are views respectively similar to Figures 2 and 3 but each showing differently shaped means whereby the distance apart of positive nips can be varied,
  • Figure is a view similar to Figure 1 illustrating an alternative embodiment of the means according to the invention
  • Figure 11 is a plan view of the cradle and means shown in Figure 10,
  • Figure 12 is a section on the line XII-XII of Figure 10, the belts and driving rollers being omitted,
  • Figure 13 is a view similar to Figure 1 but showing yet another alternative embodiment of the means according to the invention.
  • Figure 14 is a section on the line XIVXT.V of Figure 13, the belts and driving rollers being omitted, and
  • Figure 15 is a detail perspective view of the means shown in Figures 13 and 14.
  • a pair of co-operating elongated endless belts l, 2 are mounted at their rear ends on co-operating driving rollers 3 and are held in the correct working position at their forward ends by means of a two-pronged tensor 4, the belts forming a delivery nip between the prongs of this tensor.
  • the tensor d is carried on a cradle consisting mainly of a pair of parallel side walls 5 which extend one along each side of the belts l, 2 and each of which is shaped at the rear end as shown to engage the spindles of the driving rollers 3.
  • the side walls 5 are joined by a cross-member 6.
  • a condenser I mounted on a traverse bar 8, and at the opposite or delivery end of these runs there is arranged, again in known manner, a pair of following drawing rollers 9 which form a positive nip therebetween.
  • the arrangement of the driving rollers 3 is such that a positive nip is also created thereby between the belt runs at the entry end of the latter.
  • the centre distance between the belt-supporting rollers 3 and the following drawing rollers 9 is some 3%" which is considerably larger than normal, the overall length of the cradle and the length of the fibre-supporting belt runs being correspondingly increased.
  • An elongated slot I0 is formed in each side wall 5 of the cradle, the slots opening into the upper edges of these side walls and being positioned opposite to one another.
  • the dimensions of the slots are such that upstanding side lugs H, formed one at each end of a downturned flange Ila provided along the leading edge of a platform member l2, can be entered therein so that the said platform member i2 is supported between the side walls 5 of the cradle immediately below the fibre-controlling run of the lower belt 2 as shown.
  • To withdraw the platform member l2 from the cradle it is necessary merely to raise the platform relatively to the side walls 5 until the lugs ll are clear of the slots In.
  • a pluralit of such platforms I2, [2a, 12b and l2c are preferably provided as shown in Figures 2 to 9, each being of different shape depending upon the fibre lengths with which it is to be used.
  • Each of the platforms is provided with a flange Ha and upstanding side lugs ll.
  • platform i2 is shaped to extend substantially parallel to the belt runs when in position and serves as an intermediate support for these runs to prevent deformation thereof and to ensure proper fibre control.
  • the distance apart of the positive nips which immediately precedeand immediately succeed the aforesaid delivery nip is substantially equal to the centre distance between the belt-supporting rollers 3 and the succeeding drawing rollers 9, in this case some 3 as aforesaid.
  • the other platform members I241, l2?) and H20 are respectively bent along lines it, i3a and i327 which are each parallel to the flange Ha of the platform.
  • the distance between the line of bend and the flange Ma is difierent for each platform and so arranged that, when any one of the bent platform members 12a, 121) or E20 is in position in the cradle, the fibre-controlling belt runs are both supported and sharply deflected in the upward direction along the line of bend of the platform.
  • An intermediate positive nip is thus introduced into the length of the co-operating belt runs which immediately precedes the delivery n-ip and is closer thereto, and therefore also to the succeeding positive nip, than is the nip formed between the driving rollers 3.
  • a different number of notches M are provided in the flange Ha of each platform so that the various platforms can easily be differentiated one from the other and can therefore be quickly selected and inserted as required.
  • fibres up to 3" in length can be drafted successfully merely by interchanging the platform members as required, thesupporting plat.- form shown in Figures 1, 2 and 3 being: utilized when the longest fibres are being drafted so that the distance between positive nips immediately preceding and immediately succeeding the delivery nip is a maximum, and any one ofv the supporting and deflecting platforms shown in Figures 4 to 9 being utilized to bring the positive nip which immediately precedes the delivery nip closer-to thesaid delivery nip and the succeeding positive nip when it is desired todraft the shorter fibres.
  • the actual distance between the hips immediately preceding and immediately succeeding the delivery nip will, of course, depend upon the particular deflecting platform used so that this distance can be varied to provide optimum drawing conditions for various fibre lengths.
  • a transverse member l8, of substantially triangular cross-section, with one tapered: end i811 and a handle 18b at the other'end, is provided for insertion, when desired, through a pair of opposite apertures IS in the side walls fiof the cradle as shown in Fig-ures l1 and 12, the base of. the member l8 being arranged to bear" on the platform top and the upper edge of the member being arranged to bear. against the under-surface of the lower fibre-controlling belt run.
  • the provision of the notches I'l facilitates the initial entry of the tapered end 18a of member 18 between the aforesaid platform and belt run.
  • the fixed platform it provides a support for the belt runs and the distance apart of the positive nips immediately preceding and immediately succeeding the delivery nip corresponds with the centre distance between the roller pairs 3 and 9.
  • the member 18 can be inserted on top of the platform through either pair of apertures 16 and under the lower belt run to bring the positive nip im-,
  • each arm member 23 mediately preceding the delivery nip closer to provided on the lower end of each lug 2i and each arm member 23 is arranged to project through an aperture 24 in the adjacent cradle Wall 5.
  • the parts of the arms 23 which extend through the apertures 24 are formed partially with a narrow or neck portion 23a and partially witha wider portion 23b.
  • the slots 24 are each provided along the upper and lower edges with notches as at 2t and the widened portion 23b of each arm is normally engaged in one of these notches in the appropriate slot.
  • the platform is made of sufficiently thin material to allow a certain amount of spring action and, in order to effect adjustment, the arms 23 are pressed towards each other until the narrowed portions 23a are located within the slots 24.
  • the arms can be moved along the slots in either direction to tilt the platform one way or the other as shown in chain-dotted lines in Figure 13.
  • the lugs 2i spring outwards again and the portions 23b of the arms re-engage in the nearest notches25 and thereby hold the platform in the adjusted position.
  • the position of the platform will, of course, be varied according to the required distance apart of the positive nips immediately preceding and immediately succeeding the delivery nip as explained in connection with the first two embodiments.
  • the opposite narrow edgc portionsof the platform 20 comprises the means for imparting the positive nip to the belts when either of these edge portions is brought into the extreme positions shown in Figure 13 of the drawings.
  • a drafting apparatus for textile fibres the combination of a pair of superposed endless belts in elongated loop form and having adjacent operative runs for controlling fibres caused to pass therebetween, a pair of driving rollers each supporting one belt loop at the rear end of the latter and forming a substantially non-yielding positive inlet nip between the rear ends of said operative belt runs, tensor means supporting the forward ends of said belt loops and forming a yielding delivery nip between the leading ends of said operative belt runs, two parallel wall memhere) arranged one on each side of said belt loops for laterally guiding the latter and a transverse platform member which rigidly couples said side wall members together and constituting the sole coupling means between said wall members, said platform member being located in its entirety between the runs of the lower belt loop and having a plane upper surface capable of supporting the said operative belt runs and spaced from said tensor means.
  • Drafting means for use in a drafting apparatus for textile fibres said means comprising a pair. of superposed endless belts in elongated loop form and having co-operating fibre-controlling runs, a pair of feeding rollers each supporting one loop at the rear end of the latter and forming a positive inlet nip between the rear.
  • allel side wall members arranged one on each side of said belt loops to provide a cradle for laterally guiding the latter, said wall members each being shaped at the rear end partially to embrace the spindle of each said feeding roller,
  • a drafting apparatus for textile fibres the combination of a pair of superposed endless belts in elongated loop form and having adjacent operative runs for controlling fibres caused to pass therebetween, a pair of driving rollers each supporting one belt loop at the rear end of the latter and forming a substantially non-yielding positive inlet nip between the rear ends of said operative belt runs, tensor means supporting the forward ends of said belt loops and forming a yielding delivery nip between the leading ends of said operative belt runs, two parallel wall members arranged one on each side of said belt loops for laterally guiding the latter and a continuous platform extending transversely of said belts 1 from one wall member to the other wall member which rigidly couples the wall members together and constituting the sole coupling means between said wall members, said platform member being separate from said tensor means and being disposed intermediate said driving rollers and said tensor means and being disposed in its entirety between the runs of the lower belt loop and having a plane upper surface capable of supporting the entire
  • a guiding device as claimed in claim 9 wherein said supporting means comprises a platform having an elongated flat surface provided with narrow edge portions, said platform being pivotally mounted 'on said walls, and means on said walls and platform for detachably holding said platform in various positions, whereby said platform surface and edge portions are caused to selectively engage the upper run of the lower belt 15

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US2686938D 1949-02-02 Noguera Expired - Lifetime US2686938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2868/49A GB660890A (en) 1949-02-02 1949-02-02 Improvements in or relating to drafting apparatus for textile fibres

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US2686938A true US2686938A (en) 1954-08-24

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US (1) US2686938A (en, 2012)
FR (1) FR943215A (en, 2012)
GB (1) GB660890A (en, 2012)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890677A (en) * 1971-07-15 1975-06-24 John Michael Noguera Fiber drafting apparatus
US4727626A (en) * 1984-12-14 1988-03-01 Platt Saco Lowell S.A. Control of fibers in apron drafting systems of machinery used in the spinning process
US20220396900A1 (en) * 2021-06-10 2022-12-15 Saurer Spinning Solutions Gmbh & Co. Kg Top apron cradle for an apron drafting system of a textile machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429010A (en) * 1964-08-19 1969-02-25 Goffredo Fusaroli Drawing device for textile fiber preparation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1092631A (en) * 1912-05-25 1914-04-07 Fernando Casablancas Spinning-frame.
US1240670A (en) * 1917-03-12 1917-09-18 Fernando Casablancas Mechanism for drawing fibers with endless belts.
US2094229A (en) * 1932-10-11 1937-09-28 Casablancas Fernando Guiding frame of the belts for the high draft mechanisms
US2175107A (en) * 1937-12-06 1939-10-03 Casablancas High Draft Co Ltd Mechanism for drawing textile rovings
US2239863A (en) * 1937-10-23 1941-04-29 Spinnfaser Akt Ges Draw frame
US2306848A (en) * 1938-02-18 1942-12-29 Toenniessen Ernst Drawing frame

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1092631A (en) * 1912-05-25 1914-04-07 Fernando Casablancas Spinning-frame.
US1240670A (en) * 1917-03-12 1917-09-18 Fernando Casablancas Mechanism for drawing fibers with endless belts.
US2094229A (en) * 1932-10-11 1937-09-28 Casablancas Fernando Guiding frame of the belts for the high draft mechanisms
US2239863A (en) * 1937-10-23 1941-04-29 Spinnfaser Akt Ges Draw frame
US2175107A (en) * 1937-12-06 1939-10-03 Casablancas High Draft Co Ltd Mechanism for drawing textile rovings
US2306848A (en) * 1938-02-18 1942-12-29 Toenniessen Ernst Drawing frame

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890677A (en) * 1971-07-15 1975-06-24 John Michael Noguera Fiber drafting apparatus
US4727626A (en) * 1984-12-14 1988-03-01 Platt Saco Lowell S.A. Control of fibers in apron drafting systems of machinery used in the spinning process
US20220396900A1 (en) * 2021-06-10 2022-12-15 Saurer Spinning Solutions Gmbh & Co. Kg Top apron cradle for an apron drafting system of a textile machine

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Publication number Publication date
GB660890A (en) 1951-11-14
FR943215A (en, 2012)

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