US3709172A - Automatic embroidery machine - Google Patents

Automatic embroidery machine Download PDF

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Publication number
US3709172A
US3709172A US00097287A US3709172DA US3709172A US 3709172 A US3709172 A US 3709172A US 00097287 A US00097287 A US 00097287A US 3709172D A US3709172D A US 3709172DA US 3709172 A US3709172 A US 3709172A
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United States
Prior art keywords
bar
sliders
movement
needles
selection
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Expired - Lifetime
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US00097287A
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English (en)
Inventor
E Comerio
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METALMECCANICA SpA
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METALMECCANICA SpA
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
    • D05C11/16—Arrangements for repeating thread patterns or for changing threads

Definitions

  • the device comprises a selection bar arranged trans- [52] U.S.Cl "56.112/83 versely to the slides of the needles and movable "4... c di g to two substantially o th go l di ections, on Fleld of Search 83, e side pe p nd ula y to the lides of the needles to select the slides or rather the needles through en- [56] References and gagement of selected hook means of the bar with cor- UNITED STATES PATENTS responding hook means of the slides, and on the other side parallelly to the slides of the needles, to shift the 3,177,834 4/1965 Ul'SChGllBl' "112/83 elected slides in a forward position of work 1,645,532 10/1927 Hueller ..112/83 X 3,349,733 10/1967 Ree ..112/83 Claims, 14 Drawing Figures 1 ⁇ I .J JZ H J J V3, &1
  • the distance between two needles of the same range is normalized of about 27 mm.; in these conditions it is commonly said that the machine is arranged with a 4/4 ratio. In some cases it is however preferable to work with'a lower number of needles, for example with one every two (8/4 ratio), with one every three (12/4 ratio) and so on.
  • the known technique is to remove by hand one or more needles from the frame of needles, according to the desired ratio.
  • a device of this type is for example described in the Swiss Pat. No. 367.381, wherein each of the needles is mounted on a slide which can be shifted and locked at will on the frame of needles; each slide is integral with a rack with which is engaged a driving pinion to shift the slide in a working position, the needle being in a forward position in respect of the frame of needles, or respectively in a position of rest, with the needle back.
  • the single pinions are selectively operated by means of a single controlling rack, moving perpendicularly to the slides of the needles; the pinions are selected by means l0 arrangements or changes.
  • the object of the present invention is a device for the change of the color and ratio in embroidery machines, of the type inwhich such changes can be obtained by an appropriate selection of the needles, the latter being mounted on slides which are apt to be shifted and locked in respect of the frame of needles; this device is essentially characterized in that transversely over all the slides of the needles is arranged a single selection bar, movable in two substantially orthogonal directions, on one side perpendicularly to the slides of the needles, to select the slides, or rather the needles, through engagement of selected hook means of the bar with corresponding hook means of the slides, and on the other side parallel to the slidesv of the needles, to shift the selected slides in a forward position of work.
  • FIG. I is a very schematic plan view of a selected group of slides of needles, on the ratio of 16/4, with a corresponding length of the selection bar;
  • FIG. 2 is a plan view, similar to FIG. 1, but in a position previous to the selection;
  • FIG. 3 is a schematic plan view of a part of the selection bar
  • FIG. 4 is a cross-section along the line IV-IV of FIG. 1;
  • FIG. 5 is a section on a larger scale along the line V- V of FIG. 2; I 7
  • FIG. 6 is a schematic plan view of the means for the transversal operation of the selection bar
  • FIGS. 7 'and 8 are partial schematic plan views of a differentembodiment of the invention, with the needles respectively in a position of rest and in a selected position, ready for work;
  • FIGS. 9 and 10 are schematic section views along the lines IX-IX and respectively XX of FIG. 7;
  • FIGS. 11 to are section views of some different embodiments of the slides of needles.
  • FIGS. 2 and 4 show clearly the structure of the device according to the present invention.
  • the fabric 1, on which the embroidery is made, is marked by a dot and dash line.
  • Each of the needles A,B,C,D, carries a thread 2 of its own to perform the embroidery; according to the present invention, various types or colors of yarns are threaded on the needles; the needles carrying the same color of yarn are marked by the same letter.
  • the needles A which carry a first color, are placed in a l6/4 ratio, exactly like the other needles B,C,D, cyclically in the same ratio.
  • the needles are mounted on the frame 3 which performs, in a known manner, a to-and-fro movement; during this movement the needles go in and out of the fabric, always in a known manner, to cooperate with the shuttles to the forming of the stitch.
  • the needles are not mounted and fixed directly on the frame 3, according to known technique, but, according to the present invention, they are anchored on slides 4 which can slide in respect of the frame 3 in a direction substantially parallel to the axis of the needles and also to the direction of the to-and-fro movement of the frame 3 itself.
  • Each slide is provided with a pair of projecting teeth 4, 4", forming in between a transversal slit 6.
  • the selection bar is provided with a plurality of teeth 7, arranged according to a pre-established configuration, each tooth being apt to engage into a slit 6.
  • FIGS. 1, 2 and 4 show that some teeth 7 are engaged in the slits 6A, 6C of the slides 4A, 4C corresponding to the needles A and C, whilst no teeth are engaged in the slits 6B, 6D of the slides 4B, 4D corresponding to the needles B and D.
  • the selection bar 5 When the selection bar 5 is moved in the direction of the arrow F1, it carries along thanks to the engagement of the teeth 7 in the slits 6 the corresponding slides; the slides 4 are thus driven forward by means of the selection bar 5- from a backward position (in respect of the frame 3) or inactive position (position of the needles B, D in FIG. 1) to a forward position or active position (position of the needles A, C in FIG. 1).
  • FIG. 3 shows a scheme illustrating the selection bar 5.
  • the teeth lying on the longitudinal alignment A are the only ones apt to cooperate with the slide 4A, as better explained hereafter; likewise, the teeth lying on the alignments B, C, D cooperate exclusively with the slides 4B, 4C and 4D respectively.
  • the position of cooperation between teeth and slides is indicated by the axis 9 which coincide with the axis of the needles.
  • FIG. 3 which corresponds also to the position of FIGS.
  • I and 2 therefore shows that the only teeth operating lie at the intersection between the axis 9 and the longitudinal alignments bearing the same letter: as can be seen, these teeth are indicated with 7A (at the intersection of 9A with A) and 7C (at the intersection of 9C with C).
  • the selection bar 5 then performs a movement in the direction F2, which is actually the preselection movement.
  • This movement takes place by steps P of a width substantially equal to the length of the slits 6 and is performed only when all the slides are in a backward position, as indicated in FIG. 2.
  • the axis 9" will be the ones to come in coincidence with the axis of the needles.
  • the teeth beingengaged wit the slits of slides 4 will merely be teeth 7A at the intersection of 9"A with A, so as to allow the selection to an active position of needles A only.
  • the selection bar 5 has, on its side turned towards the slides, a profile with longitudinal steps 8, with a step for each alignment; the step on the lowest level, on alignment A, is also the most advanced step in the direction Fl.
  • Each subsequent step is at an upper level, slightly higher than the height of a tooth 7, so that each tooth projecting downward from a given step does not project beyond the level of the preceding step.
  • the teeth 4, 4 of the slide 4A project from upper plane of the slide up to a level slightly below the level of the step 8A, the teeth of the slide 48 do not exceed the level of the step 88, the teeth of the slide 4C do not exceed the level of the step 8C and the teeth of the slide 4D do not exceed the level of the step 8D.
  • the teeth 7 of alignment D which, upon forward movement, cross the alignment BI even if they should run along the axis 9 of the needles B, they would not interfere with the teeth 4, 4 of the slide4B, but they would move above and away from them.
  • the number of selection positions i.e., of teeth 7
  • the number of selection positions may cover not only the length of about 27 mm., comprised between two adjacent needles, but the full distance between two needles of the same color, which for example in the case of FIG. 3
  • FIGS. 3 to 5 show a particularly advantageous structure of the selection bar 5.
  • the bar 5 is provided with holes of even diameter in correspondence of every intersection between each axis 9 and each alignment A, B, C, D.
  • the holes may be housed pins 13, of a length suited to the level of the step to which they must correspond.
  • Each pin 13 has a widened stop head, and the portion of each pin projecting from the relative step forms a corresponding tooth 7.
  • a plate 5a closes the bar 5 on the upper part and locks the pins housed in the holes.
  • pins 13 can be made stout enough, it is not even necessary for the bar 5 to be step-shaped, as it would be sufficient for the pins themselves to be of different height.
  • the movement of the selection bar 5, in both its F1 and F2 directions, is by preference automatically controlled by the general Jacquard device of the machine; however, in the event that the change of color should be made comparatively seldom, also manual control is possible. Anyhow, to move the bar 5 in the direction of the arrow F2, a driving means at the ends of said bar is sufficient, said means acting alternately in the two directions along the longitudinal axis of the bar. To move the bar 5 in the direction of the arrow F1, is for example provided a device of the type illustrated in FIG.
  • the slides 4 have a double-T section and are guided on the opposed edges of adjacent guiding plates 21, fixed onto the frame 3 by means of screws 22, The needles are held locked on .the slides 4 by means of respective screws 23.
  • a thread guide 24, placed at the head of each slide 4 helps to keep the thread 2 running above the cover 25 in alignment wit the needles (see FIG. 10).
  • the cover 25 is due to protect from dust the underlying member's, allowing at the same time the free running of the threads 2.
  • the selection bar 5 here comprises only two rows of holes for the teeth 7, in the form of pins or rivets 13.
  • the bar 5 is mounted on the slider 26.
  • the bar 5 is provided with a longitudinal slit 27 (FIG. 8), in which is engaged a tail- I piece 26a projecting upwardly from the slider 26; a screw 28 tightens a plate 29 on the head of the tailpiece 26a, thu's checking the bar 5, which is however still allowed to move in a longitudinal direction in respect of the slider 26.
  • the slider 26 is in turn mounted to slide crosswise into a guiding slit 21a provided in one of the guiding plates '21 (see FIGS. 9 and 10).
  • a pivot 30 projects downward from the slider 26, said pivot carrying a small roller 31 engaged in a cam-shaped groove 32 of the control bar 33.
  • the slider 26 Thanks to the cooperation between the roller 31 and the groove 32 is caused to move crosswise, as better specified hereafter.
  • FIGS. 7 to 10 further provides for a locking bar 35, in the form of a comb, comprising a set of teeth 36, projecting upwardly.
  • the number of the teeth 36 corresponds to the number of the slides 4, and said teeth are apt to engage each into a notch 37 or 38 provided in the lower'faee of each slide 4.
  • FIGS. 7 and 8 show, with dashed lines, a single lever 39.
  • One of the arms of the lever 39 ends with a head 41 which engages into a slit 42 of the locking bar 35.
  • the other arm of lever 39 carries the pivot 43 on which is mounted the small roller 34, the latter engaging into a cam-shaped groove 45, provided in the control'bar 33.
  • the lever 39' thanks to the cooperation between the roller 44 and the groove 45 is caused to rotate clockwise or anticlockwise in respect of pivot 40; according" tothis rotation, the head 41 will operate the locking bar 35 in a direction .from'left to right of FIG. 7 (thus disengaging the teeth 36 from notches 37 or 38), or respectively in a direction from right to left (thus engaging the said teeth 36 into the notches 37 or 38, for locking).
  • the sequence of the movements is as follows: starting from the position of FIG. 7, first of all the bar 5 for the pre-selection of the slides is shifted in a longitudinal direction: this pre-selection is performed thanks to the engagement of a pre-established set of teeth 7 into the slits 6 ofa corresponding group of slides.
  • the pre-selection having been done, the control bar 33 is operated from the right to the left of FIG. 7. As soon as this movement starts, the small roller 31 meets the incline of the cam-shaped groove 32 and causes the shifting of the slider 26 from the bottom to the top of FIG.
  • the machine may start to work, with the known to-and-fro movement of the frame of needles; during performance, the impact undergone by the needles when they meet and pierce the fabric 1, is stood by the teeth 36, fixed into the notches 38 of the selected slides.
  • the bar 5 and the respective teeth 7 are charged with the exclusive task of p re-selecting and selecting the slides 4, while the task of locking the slides 4 in a position of work (or respectively of rest) is entrusted to the locking bar 33.
  • This allows on the one hand to construct the bar 5 and the teeth 7 of lighter material and of smaller dimensions (and thus increase the number of positions for selection ona given length of the bar 5), and on the other hand to provide a certain slack between teeth 7 and slits 6, which facilitates the movement of the bar 5.
  • the locking into exact position of the selected slides is then guaranteed by the bar 33, which is apt to operate, even if the selection has not been exactly performed, thanks to the beveled edges of the notches 37 and 38, which facilitate the engagement of the teeth 36.
  • each slide has a substantially upside-down T-shaped section, and a surface of the same rises from the upper plane of the frame 3, to carry the teeth 4', 4-'.
  • the slide has a circular section and slides in a cylindrical seat of the frame 3; this cylindrical seat will be at least partiallyopen upwardly for the free passage of the teeth 4', 4".
  • the section of the slide is semicircular and respectively triangular; a flat side of the slide rises to the level of the upper plane of frame 3, whilst one or more longitudinal strips 3 keep the slides in their seat.
  • a plurality of needle-carrying sliders mounted on the needle frame for sliding movement in a direction substantially parallel to the axis of working movement of said needles to move the needles from a non-working position in which the needles do not engage the fabric during movement of the needle frame to a working position in which the needles engage the fabric during movement of the needle frame to effect embroidery thereon;
  • a selection bar mounted on said needle frame for movement in two substantially orthogonal directions;
  • said selection bar has a plurality of members disposed thereon projecting toward said sliders in preestablished positions, said sliders having transverse slots formed thereon for engagementwith selected ones of said plurality of members, said members engag I ing said slots during movement of said selection bar in said one orthogonal direction.
  • each group of said sliders comprises all the sliders spaced from one another according to a predetermined ratio of said embroidery machine.
  • control bar mounted for longitudinal movement on said needle frame transversely of the axes of movement ofsaid sliders;
  • connecting means connecting said control bar to said guide means for translating the longitudinal movement of said control bar into the sliding movement of said selection bar parallel to said sliders.
  • said translating means comprises at least one lever mounted for pivotal movement on said needle frame and having two arms disposed substantially at right angles with respect to each other, a first arm being pivoted directly on said control bar and a second arm being connected to said guide means.
  • said translating means comprises a cam profiled section formed in said control bar, said guide means comprising a cam following roller engaging said cam-profiled section.
  • a locking bar movable along a longitudinal'locking axis, said locking bar having teeth for engaging said first notch of said at least one slider selected by said selection bar and moved into said working position and for engaging said second notch of non-selected sliders remaining in said non-working position to lock said sliders in their respective posi-. tions;
  • connecting means connecting said locking bar to said control bar, the longitudinal movement of said locking bar being controlled by movement of said control bar, said connecting means comprising at least one further cam profiled section of said control bar and a further cam-following roller engaging said further cam profiled section and connected to said locking bar;
  • cam profiled section and further cam profiled section are so disposed on said controlbar that when said control bar is moved in a first longitudinal direction said locking bar is moved into engagement with said sliders after said at least one selected slider has been moved into said working position by movement of said selection bar, and in an opposite direction of movement of said control bar, said locking bar is moved out of engagement with said sliders before said selection bar is moved by movement of said control bar to return said at least one selected slider to its non-working posi- 129% apparatus as defined in claim 8, wherein said needle-carrying sliders are provided with first and second notches; said apparatus further comprising: a locking bar movable along a longitudinal locking axis, said locking bar having teeth for engaging said first notch of said at least one slider selected by said selection bar and moved into said working position and for engaging said second notch of non-selected sliders remaining in said non-working-position to lock said sliders in their respective position; and connecting means connecting said locking bar to said control bar, the longitudinal movement of said locking bar being controlled by movement of said control bar.
  • said connecting means comprises: a member engaging said locking bar; a cam profiled section of said control bar; and a cam-following roller connected to 'said member and engaging said cam profiled section.
  • said member comprises a two-armed lever mounted for pivotal movement on said needle frame, one arm of said lever carrying said cam-following roller and the other arm contacting said locking bar directly.
  • said needle-carrying sliders are provided with first and second notches; said apparatus further comprising a locking bar movable along a longitudinal locking axis, said locking bar having teeth for engaging said first notch of said at least one slider selected by said selection bar and moved into said working position and for engaging said second notch of non-selected sliders remaining in said non-working position to lock said sliders in their respective positions.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US00097287A 1969-12-13 1970-12-11 Automatic embroidery machine Expired - Lifetime US3709172A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2575169 1969-12-13
IT3233970 1970-11-27

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US3709172A true US3709172A (en) 1973-01-09

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US (1) US3709172A (fr)
JP (1) JPS5019098B1 (fr)
AT (1) AT316969B (fr)
CH (1) CH522773A (fr)
DE (1) DE2061300C3 (fr)
FR (1) FR2073715A5 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823678A (en) * 1971-04-05 1974-07-16 A Langenegger Automatic color-change mechanism for shuttle embroidering machine
US3884165A (en) * 1973-05-18 1975-05-20 Ikuo Tajima Needle-bar and take-up lever selection apparatus for embroidery machine
US4254721A (en) * 1977-11-07 1981-03-10 Maschinenfabrik Carl Zangs Aktiengesellschaft Device for the intermittent interruption of the embroidery needle movement on embroidery- or sewing machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1085231B (it) * 1977-05-30 1985-05-28 Simonetta Enrico Macchina da ricamo a telaio automatica con selezione a programma degli aghi attivi e non attivi

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1645532A (en) * 1923-05-26 1927-10-18 Hueller Walter Needle mechanism
US2649065A (en) * 1948-12-07 1953-08-18 Electrotext Corp Embroidery machine and coded-tape control means
US3092054A (en) * 1959-11-11 1963-06-04 Marschik Eduard Apparatus for carrying out automatic repeat change in embroidery machines
US3177834A (en) * 1963-07-17 1965-04-13 I A S Bicor Corp Apparatus for changing color work in an embroidering process
US3349733A (en) * 1965-06-30 1967-10-31 I A S Bicor Corp Thread holding and releasing system in change-color embroidery machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1645532A (en) * 1923-05-26 1927-10-18 Hueller Walter Needle mechanism
US2649065A (en) * 1948-12-07 1953-08-18 Electrotext Corp Embroidery machine and coded-tape control means
US3092054A (en) * 1959-11-11 1963-06-04 Marschik Eduard Apparatus for carrying out automatic repeat change in embroidery machines
US3177834A (en) * 1963-07-17 1965-04-13 I A S Bicor Corp Apparatus for changing color work in an embroidering process
US3349733A (en) * 1965-06-30 1967-10-31 I A S Bicor Corp Thread holding and releasing system in change-color embroidery machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823678A (en) * 1971-04-05 1974-07-16 A Langenegger Automatic color-change mechanism for shuttle embroidering machine
US3884165A (en) * 1973-05-18 1975-05-20 Ikuo Tajima Needle-bar and take-up lever selection apparatus for embroidery machine
US4254721A (en) * 1977-11-07 1981-03-10 Maschinenfabrik Carl Zangs Aktiengesellschaft Device for the intermittent interruption of the embroidery needle movement on embroidery- or sewing machines

Also Published As

Publication number Publication date
DE2061300C3 (de) 1974-11-28
FR2073715A5 (fr) 1971-10-01
DE2061300B2 (de) 1974-05-02
AT316969B (de) 1974-08-12
DE2061300A1 (de) 1971-06-16
CH522773A (it) 1972-06-30
JPS5019098B1 (fr) 1975-07-04

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