US2798259A - Drawing mechanism for textile machines - Google Patents

Drawing mechanism for textile machines Download PDF

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Publication number
US2798259A
US2798259A US384245A US38424553A US2798259A US 2798259 A US2798259 A US 2798259A US 384245 A US384245 A US 384245A US 38424553 A US38424553 A US 38424553A US 2798259 A US2798259 A US 2798259A
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US
United States
Prior art keywords
roller
rollers
frame
roving
fibres
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
US384245A
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English (en)
Inventor
Solanas Ramon Balmes
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.)
Estirajes Balmes SA
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Estirajes Balmes SA
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 Estirajes Balmes SA filed Critical Estirajes Balmes SA
Application granted granted Critical
Publication of US2798259A publication Critical patent/US2798259A/en
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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
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides

Definitions

  • the present invention relates to drawing mechanisms for drawing textile rovings or' slivers, such as are used in spinning and preparing machines, in which the said roving or sliver of fibres passes between a series of pairs of rollers and sometimes through other members which accompany the fibres.
  • the invention relates to drawing mechanisms using a conducting roller of this type for the fibres and its object is to improve the working of this conducting roller and to facilitate the handling of the machine.
  • the invention consists essentially in the use of a small apparatus or device, resting on two consecutive bottom rollers, this device conducting and pressing the fibres and at the same time uniting these fibres or reducing the width of the roving.
  • the device in'question consists of a rigid frame provided with a roller for conducting or pressing the fibres and having formed in the lower portion thereof a reducer for reducing the width of the roving or slivers, a handle being provided at the top of the frame for facilitating the operation of placing the device in and removing it from the machine.
  • the said roller is mounted inside the frame in such a way that itvis able to rotate freely and projects beyond the edges of the frame both at the front and at the rear and it rests on the bottom rollers of the two adjacent pairs of rollers mentioned.
  • the fibres When the fibres enter the device in question they are first of all submitted to compression between the pressing roller and the first roller of the pair of machine rollers in the direction of movement of the roving, the fibres then continuing while still contacting the surface of the pressing roller over a certain distance thereof, the pressing roller guiding them, preventing by adherence the loose fibres from breaking away. The fibres then pass through the reducer and then continue moving for a certain distance while contacting the surface of the pressing roller and finally undergoing a second compression between the pressing roller and the lower roller of the next pair of machine rollers.
  • the device according to the invention provides a perfect guiding action and grouping of the fibres together so that a better drafting is obtained and the thread produced is stronger and more uniform.
  • the pair of rollers which succeeds the device has top rollers of a small size for facilitating the sliding action of the fibres.
  • the pressing roller may be provided with a groove or 2,798,259 Patented July 9, 1957 throat into which the fibres are made to pass for improving the uniting effect.
  • the condenser is provided with an open or slotted notch so as to lead the fibres towards the groove of the pressing roller.
  • Fig. 1 shows diagrammatically and in section in the direction followed by'the roving or slivers the central partof a drawing mechanism consisting of several pairs of rollers provided with the pressing and uniting device.
  • Figure 2 is a vertical section of the apparatus showing a detail.
  • Figure 3 is a front view of the apparatus.
  • Figure 4 is a similar view of another embodiment of the invention, the pressing roller of which is grooved.
  • Figures 5 and 6 are a front and vertical sectional view respectively of another embodiment in which the pressing roller is grooved and the sliding roller is very narrow being introduced into the groove of the pressing roller.
  • Figure 7 is a similar view to that shown in Figure 1 of an embodiment in which the frame does not rest on the bottom rollers.
  • Figure 8 shows a detail modification of Figure 7.
  • Figure 9 is a front view of the frame and roller of this form of construction.
  • Figure 10 is a disassembled view showing how the frame in Figures 7 to 9 is formed.
  • the drawing mechanism shown in Figure l is provided with a number of intermediate rollers 1, 2 and 3, 4, the second pair 3, 4 of which is provided with a top roller 4 of small size arranged so as to allow the sliding of the fibres.
  • the pressing uniting device of the invention is located between these two pairs of intermediate rollers, and as illustrated in the drawings, it compresses the fibres of the roving or slivers at two points against the two lower rollers 1, 3 of the adjacent pairs of rollers, effecting in addition between these two points a reduction of the roving or sliver or uniting of the fibres of same.
  • the rollers 1, 2, 3 and 4 each have portions of the surface thereof which are roughened in order to grasp the roving and defining a drafting path. The roughened portions are not shown.
  • the roving or sliver 5 on penetrating into the drawing mechanism undergoes a first drawing or prior drafting and isthen gripped by the next pair of rollers 1, 2. It then passes to the next pair of rollers 3, 4 while being guided by the pressing roller 6, and from these to the final drawing rollers, the latter effecting the second drawing or final drafting of the roving.
  • the pressing uniting device forming part of the present invention consists of a small frame 7 provided at its upper part with a handle 8 to enable the device to be handled easily and at its bottom part with a channel 9 which acts as a condenser for the roving or sliver or fibre uniting device.
  • the pressing roller 6 which projects at both sides of the frame and which is shorter in the direction of its length than the width of the roughened portions on rollers 1, 2, 3 and 4.
  • this roller When this roller is in its working position it bears on the lower rollers 1, 3 of the two adjacent pairs of rollers, the roller having compressive action on the roving at these two points. Between these two compression points the roving follows the surface of roller 6 for a certain distance and then enters channel 9 forming the condenser for the fibres.
  • the edges of the frame 7 rest on the lower rollers l and 3 and the pressing roller 6 is completely free inside the frame and also bears on the rollers 1 and 3.
  • the pressing roller 6 is provided with small journals 10, these the lower journals resting when the device is not in the working position against angularly disposed ribs 11 provided on the inside faces of the frame.
  • the position of these ribs 11 is preferably such that, when the roller 6 is -in its working position, it simply bears against the lower. rollers 1, 3 so that its-journals are lifted. clear of the ribs in question. 7
  • the ribs 11 on the lateral faces of the frame are preferably arranged in such a position that theroller 6 cannot become detached from the frame by accident.
  • one of theends 12 of these ribs is so high up that it prevents the roller 6 from coming out of the frame, since the face of the roller encounters the top part 14 of the frame before this can take place.
  • Thevother end-l3 is further down so that it allows the roller to be detached at this side but it is high enough up to make it necessary to exert a certain amount of force in order to free the roller, the ideaof this being to prevent this roller coming out of the frame by accident.
  • the lower part of the frame 7 has the shape of a channel '9, this part forming the part for uniting or condensing the fibres.
  • channel is very wide *and is formed by the two bottom edges 15 and narrows rapidly until it forms a very narrow groove 16, the roving or sliver entering this groove and rubbing along the bottom 17 of it.
  • no particular care is needed when placing the device on the drawing mechanism so that the .roving or sliver is easily embraced between the inlet edges 15 of the channel, the inclined planes formed by these edges conducting the roving or sliver to the groove or narrow part 16 where the uniting or condensation of the fibres is effected.
  • FIG 4 A modification of the device is illustrated in Figure 4, the'roller 18 being provided in this case with a groove 19, it being this groove which actually effects the uniting or condensation of the fibres.
  • the channel 9 at the bottom of the frame isopen so that the roving passes through the opening 20 entering the roller groove 19. This method. enables the reducing action to be effected with less friction, owing to the fact that the lateral walls of the groove 19 follow the .motion of the roving.
  • the frame is preferably composed of. anumber of 1 parts or elements 29,- 30 and .31,as illustrated in Figure 10, these parts being assembledtogether by means of screw, the roller 26 being easy to assemble in the frame. With a construction of this sort, ittwould be a simple The mouth of this 4, matter to dismantle the frame for purposes of cleaning or for replacement of the roller.
  • the frame does not bear on the bottom rollers 1, 3, the device resting as a whole on these rollers 1, 3 solely through the rotary roller 26 so as to reduce the friction between the various parts.
  • the frame 27 only touches the roller 3 at the projections 23 at the end of the lower reducing channel at which the fibres are delivered to the point of tangency between the rollers 3 and 26.1,.
  • the ,lower part of the frame is preferably shaped so as to make this zone of contact as small as possible. 7
  • a device for pressing and uniting the fibers of the-roving comprising'a rigid frame adaptedto fit between the lower rollers of adjacent pairs, and a pressing roller rotatably mountedwithin said frame and adapted.
  • said frame consisting of two side portions each having- .the width of the drafting path in the direction of the I 'length vof said pairs of rollers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US384245A 1952-11-11 1953-10-05 Drawing mechanism for textile machines Expired - Lifetime US2798259A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES315289X 1952-11-11

Publications (1)

Publication Number Publication Date
US2798259A true US2798259A (en) 1957-07-09

Family

ID=8245063

Family Applications (1)

Application Number Title Priority Date Filing Date
US384245A Expired - Lifetime US2798259A (en) 1952-11-11 1953-10-05 Drawing mechanism for textile machines

Country Status (5)

Country Link
US (1) US2798259A (enrdf_load_stackoverflow)
BE (1) BE522223A (enrdf_load_stackoverflow)
CH (1) CH315289A (enrdf_load_stackoverflow)
FR (1) FR1081722A (enrdf_load_stackoverflow)
GB (1) GB742958A (enrdf_load_stackoverflow)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE321806C (de) * 1918-01-27 1920-06-15 Saechsische Maschinenfabrik Vo Walzendurchzugstreckwerk mit aushebbarem Bremsfinger
US2205701A (en) * 1937-06-30 1940-06-25 Solanas Ramon Balmes Drawing mechanism for textile slivers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE321806C (de) * 1918-01-27 1920-06-15 Saechsische Maschinenfabrik Vo Walzendurchzugstreckwerk mit aushebbarem Bremsfinger
US2205701A (en) * 1937-06-30 1940-06-25 Solanas Ramon Balmes Drawing mechanism for textile slivers

Also Published As

Publication number Publication date
CH315289A (fr) 1956-08-15
BE522223A (enrdf_load_stackoverflow)
GB742958A (en) 1956-01-04
FR1081722A (fr) 1954-12-22

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