US1988401A - Felling machine for joining fabric sections - Google Patents

Description

Jan. 15, 1935. c, 5;. THOMPSON 7 1,988,401

FELLTNG MACHINE FOR JOINING FABRIC SECTIONS Filed July 12, 1933 2 Sheets-Sheet 1 Jan. 15, 1935. Q 5 THOMPSON 1,988,401

FELLING MACHINE FOR JOINING FABRIC SECTIONS File July 12, 1935 2 Sheets-Sheet 2 Patented Jan. 15, 1935 UNITED sTAr ES I FELLING" MACHINE "FOR JOININGQFABRIC' j SECTIONS I I Charles Thompson, Elmhurst, 111, assignor to Union SpeciaLMachine CompanYLChicago IlL,

a corporation'ofIllinois; .1

. Application July 12Q1933; Serial No.' 630,127

11 Claims; (01, 1125151).

The invention relates Go-new and useful improvements in a'felling machine for joining fabric sections, and more particularly to theconstruc tion of the 'presser foot used therein. In my ap- 5 plications'Serial Nos. 633,898 and 633,899, filed September '19, 1932; there "is shown, described and claimed a felling machine wherein the fabric sections are gripped at each sideof {the interfolded I parts'ofthe-seam for the'feeding of the'fabric sections; I

An object of the present invention is to provide amachine of the above type with a presser foot having means cooperating with the foot to grip the fabric sections at each side of the interfolded portions, and a section located directly above the interfolded portionsforcontrolling the feed of the same, and in particular during the passing of cross seamsfwhich section may be locked-in aset position or may yie1d,'andmay be placed either so that it is normally in contact with the inter. folded fabric sections'or spaced above the same. A further object of the invention is to provide a felling machine withfa presser foot having fabric engaging sectionsjarranged tintandem wherein said'sections arepivot'allyimounted'on a supportingyoke which" in turn is pivotally mounted on the presser bar,"an d wherein there is means carried by thepresserbar for preventing undue swinging of the yoke when the foot sections are raised for the insertion or removal of the ma-' terial. .1. A, still further. object. of the. invention is tofpro- -vide a felling machine of the above type wherein the front section of the presser foot is lpivotally supported on a supporting yoke and f'yieldi held in a substantially horizontal position."

' Inthedrawings-f-r f Figure 1 is a view of a portion" of a machine 40, showing my improvements applied thereto i 'Fig, 2 isa sectional viewv on the line 2-. 2 of Fig.1; 1

Fig. 3 is a'sect'ionalvievv on th'eline 3-3 of Fig.2; v N

Fig. 4 isva bottom plan view of the presser foot; Fig. 5 is a vertical sectional view in the line of feed; and I Fig.6 is a transverse sectional view showing a modified form of arrangementof .the portions of the foot engaging the fabric sectionsat the-op posite sides of the interfolded portions.

The invention is directed to amachine' for.

joining the edges .of fabric sections bya felled seam. Itwincludes a folder for overfolding the 5 edge portion of. one fabric section and for under-.

ngly'v may also be locked in a set position.

folding the edge portion of'the other'fabric sece tion, and the interenga'ging o'f the folded portions; The stitching mechanism; as illustrated; includes three needles, and preferablythere" is a looper which cooperates with eachneedle, so as to form 5 independent lines of-stitching. The material is fed across the work support by a feeding-mechanism includinga" four-motion feed dog'. The material is h'eld'on the work supportby; a presser foot which includes two fabric eng gi g-s e- W tions operating in tandemi The fedflog'ghas' feeding sections cooperating witheach of the fabric engaging-sections on thepresser foot. The presser foot; the throatplateIand thefee'ding' sections are so constructed as to gripthe fabric sections" independently atopposite sides of the interfolded portions of thefabric sections for the feeding-ofthe ame; Eachsection of the; presser foothas a"cha'nne1 therethrough to receive and guide the int'erfolded portions of the fabric sec-" tions. There are sections of the feed dogj'engaging the interfoldedportions of the'fabric'sec tions on the under face thereof; 'Iheiirearfsec. tion of the presser foot is-pr'ovidedwitha shift able section which is located: in the channel,"re.- ceiving and "directing the-interfolded portionsof "the fabric sections. J This member may be yieldingly pressed toward ithe fabric. sections and I an adjustable stop'is' provided for limiting its downward movementso that said yielding section may befcaused to engage, if desired,the -interf ed t mwork sl y ac ve the samefand only opei'ated whe n a cross seampasses to eng g -and aid in the feedin'g'of the fabric sec? tions during the passing of such cross seam; It

. It -"fi Q shthe nv nti n i beib t fr n-i derstood' by-a detail description of the jillusj trated embodiment thereof; 'In'the drawingsjthe sewing machine isshown asfincludingafsupporting base 1 which extends lipwa lyf l lthe form of a standard "2 A needle headj3 'is' car ried by an overhanging portion mounted on the standard, and the work supporting arm 4 is suspended from the-standard. lihe machinaas. shown, is of the type illustrated'in the patent grantedNorman V. Christensen et 9.1,; Decembe the machineis not thought'necessary. v i

Mounted on the'worksupporting armis a fold er 5 which is of the usual-type and consists of two cooperating sections, one of whichoverfolds' the under fabric section and the other of which underfolds the upper fabricsection. These folded portions are directed so th'at they areinte'r 24; 1929 #1,'74.1,09.5, and further. description'.jof a specti'vexfabrio sections for the feeding (of the same. Beneath this shiftable'portion.35 is-the section 44 of. the feed dog, and when said portion 35 conta'cts withthe.interfolded fabricsections bya cross seam passing through the machine; then the feed dog. section 44 will aid in the feeding :of the interfolded stitched together portions of the fabric sections. InFig. 6 of the drawings thereis shown a slightly modified formn'of presserr foot, throat plate and-feed dog,wherein the portion43 of the presser foot is on the same level-as the portion 42. 'I'hethroat plate is 'of the same'height at opposite sidesof "the interfolded portions of the fabric; and the feed: dog. is correspondingly shaped so thatthe fabric sections at each side of theinterfoldedportions thereof will be gripped for'the principalfeedin'g of the fabric sections. The shiftable portion 35 is of the same construction'asthat described above, and operates in the same manner. In this figure ofthe drawings, this shiftable'portion' is shown in a set position spaced above the fabric sections. under normal interfolding conditions. 1 I

The yoke 18 is capable of a limited movement on its pivotal connection .20. Directly above the yoke areshoulders 45 which are spaced slightly above said yoke, and said shoulder is-out of contact with the yoke when thetwo foot sectionsv are pressed into contact with the. smooth surface of the throat plate, or into contact'witlifabric sections of uniform thickness. When a fabric section isled beneath the front portion of the foot, it can be bodily raised, and'the yokeiwill swing on the rear section of the foot to :permit this easy passing of the fabric sections-beneath the foot. The pivotal connectionpermits this swinging of the yoke while the presser barmoves in a vertical direction. The same is true when the fabric is passing from beneath'the rear section of the foot. It will be elevated;'although' the front section'moves down on to the throat plate, and will" properly hold and control the fabric sections until they arefed from beneath the'foot. Theyoke will also permit thefoot sections to raise'and lower to accommodate 'cross'seams as.

they pass first beneath one and then the other of the foot'sec'tions' lhese shoulderswill prevent abnormalswinging of the yoke'when the foot sections are raised clear of the work support for the insertion or removal-of: material. The

shoulders limit the swinging movement and maintain the foot sections substantially on the same level!" It is obvious that from the spirit of the invention, as set forth in the appended claims.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is-- 1. In a felling machine, the combination of a work support, a feeding deviceand a presser foot,

said presser foot including a front section, a rear fabric sections.

2. In a felling machine, the combination of a work support, a feeding device and a presser foot, said presser foot including a front section, a rear minor changes in the detailsv of construction may be made without departing,

section, apivoted yoke to 'which said sections are independently pivoted, each section of the presser foot having a channel in its under face forre-.

ceiving-and directing: the interfolded portions of v the fabric sections, said rear sectionof the presser foot: having a shiftable portion in saidvcha'nn'el, a supporting stem to'which saidshiftable portion is fixed, means. for supporting said stem on'said rear section :of the'foot so that .it moves in a direc-r work support, afeeding device and a presserfoot,

said presser foot including a. front section,,a rear section, apivotedyoketowhich said sections are independentlypivoted, each section of the presser foot having a channel in its under face for re-' ceiving and directing the interfolded portions of,

the fabric sections, said rear section of the presser foot having a yielding 'portion insaid channel, a

supportingstem to which said yieldingxportion is fixed, means forsupporting said stem on said rear sectionof theifoot' sothat it moves in a direc-' tion-at right angles to the fabric'engaging sec'- tion of said foot, *a'c'ollar havinga threaded conmotion. to said stemandserving as a stop-for limiting the downwardmo-vement of 'saidyieldingforcingthe stem downward. r l

4. In a felling niachinepth combination of' a work support, a feeding device and a'pres'ser foot, 7

said presser footincluding'a front section, a rear section, a pivoted yoketowhichsai'd sections are independently pivoted, each section of the presser foot having a channel in its underface for receiving' and directing the interfolded portions of the fabric sectionssaid rear section of the presser foot having a yielding portion insaid'channel, a supporting stem to which said yielding portion is fixed, means for supportinglsaid stemon said rear section- 0f the'foot so that it moves in-a direction at'right angles to the fabric engaging sectionofsaid foot, 'a collar having a threaded connection tosaid stem 'and -serving' asa' stop for limiting the downwardm'ovement of said yielding portion, a'nda sprin'g bearing on said collar for forcing the'stem downward, said collar having grooves formed therein adapted to house the spring for preventing-the turning of the collaron the ste hen said spring is in engagement therew t go; -5;. 12.

5. In a felling machine, the combination of a work support, a feeding device, a presser foot, a presser bar, said presser foot including a front section and a rear section arranged in tandem,.a

yoke to which said sections are independently pivoted, means for pivotally connecting said yoke to said presser bar, a spring carried by said yoke and bearing on the front sectionof-the presser foot for yieldingly holding said front section in a predetermined set position, and a spring carried by said yoke and bearing on the rear section of the presser foot for normally holding the front end thereof yieldingly depressed.

6. In a felling machine, the combination of a work support, a feeding device, a presser foot, apresser bar, said presser foot including a front section and a rear section arranged in tandem, a yoke to which said sections are independently pivoted, means for pivotally connecting said yoke to said presser bar, shoulders carried by said presser bar above said yoke and limiting the turning,

30. portion,- and aspringbearing-onsaid collarfor 7 section. anda rear section arranged in tandem, a yoke to which said sections are. independently pivoted, means for pivotally connectingsaid yoke to said presser bar, shoulders carriedby said presser .bar above said yoke andlimiting the turning movement of the yokeron its pivotal connection, a spring carried by said yoke and bearing on the front section of said pressersfoot foryieldingly holding said-frontsection in a predetermined set position on saidyoke, and'a spring carried bysaid yoke and bearing on the rear section of the presser foot for normally'holding the front end thereof yieldingly depressed. Y

8. In afellingmachine, thecombination of a work support, asfeedingudevice a .presser foot, apresser bar, said presser. foot includingla front section and a rear section, arranged in tandem, a yoke to which said sectionsgare independently pivoted,means iorpivotally, connecting said yoke to said presser banand shoulders carried by said presser bar above said yoke-and limiting the turningmovement of the yoke onits pivotalconnection ,,each of said presserfoot sectionshaving a channel in its under face for receivingzand directing the interfolded portions of iabric sections, said rear section of. the 'presser, foot having a yielding portion in said'channel directly above the interfolded portions ,of thefabric. sec.-

, 9. -,In a felling machine, zthe combination of a; work support, ,alfeedingrdevice, a presser'foot,

a presserbar, saidnpresser ifoot including a' front section-and a rear V'sectionjarranged in tandem,

a' yoke to whichsaid sections are independently I pivoted, means-fonpivotally connectingsaidyoke foot sectionin a'direction at'right angles to the fabric engaging-face of the foot section,"a collar threadedlabovesaid stem and limiting the downward movement thereof, and a spring carried by. said rear foot section and bearing on said collar for forcingthe stem downward. 10. 'In afelling machine,the combination of a' work support, a feedingdevicaa presser foot, a presser ban'said presser foot including a, front section anda rearccsection arranged in tandem, a yoketo which said sectionsare independently pivoted; means for pivotallyiconnecting saidyoke to'said. presser; bar,s hou1 ders carried by said presser. bar above said yokeoand limiting the turningmovement of the yoke-on its pivotal'com nection, each section of the presser foot havins a channel in itsunder face for'receiving. and

means for guiding said stem on said presser foot section in a direction at right angles to the fabric engaging :face' of the .foot section, a collar threaded'above said stem andlimiting the down-,

ward movement thereof,land a springrcarriedby said'reartfoot section and. bearing on said collar for forcing the-stem downward, said collar having grooves formed therein for receiving and housin the spring, whereby when-saidspring is in en gagement with the collar, said spring will hold said collar from rotating on said stem.

a 11. In a felling machirrathecombination oiv a. work support, a feeding device and, a presser foot-,- said presserfoot including a front section, a rear section, a pivoted yoke topwhich said sections arev independently pivoted, each section of the presser foot having a channel in its under face for receiving. and directing the interfolded portionsof ,thefa'bric sections, said rear section of the presser foot having a shiftable portion in said channeha supporting stem to which said ,shiftable portion isfixed, means for supportingsaid stem-on said rear section of the foot so'that it moves in a direction at right angles tothe fabric engaging'section of. said footra, spring bearing on the stem fon-yieldingly pressing said portion downwardly, ,anadjustable stop forlimiting the downward movement '01? said shiftable portion, and means whereby, said shiftable portion may be locked in a setposition. v

CHARLES s. THOMPSON.

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