Патент USA US2137697код для вставки
Nov. 22, 1938. w ‘R. c. PIERCE ‘2,137,697 MANUFACTURE OF WEATHER STRIP ELEMENTS Filed March so, 1935 4 Sheets-Sheet 1 INVENTOR. ROBERT C P/ERcE BY 7,2 C," ~ ATTORNEY. Nov. 22, 1938. R. c. PIERCE 2,137,697 MANUFACTURE OF WEATHER STRIP ELEMENTS Filed March so, 1935 4 Sheets-Sheet 2 INVENTOR. ROBERT C. PIERCE BY 7726M ‘8 5011a . ' ATTORNEY. Nov. 22, 1938.. R. c. PIERCE 2,137,697 MANUFACTURE OF WEATHER STRIP ELEMENTS Filed March 30, 1935v 4 Sheets-Sheet 3 INVENTOR. ATTORNEY. ' Nov. 22, 1938. R. c. PIERCE I _ 2,137,697 MANUFACTURE OF WEATHER STRIP ELEMENTS Filed March 30, 1935 /o . 4 Sheets-Sheet 4 A: @@ 27 AA A INVENTOR. BY ROBERT C. PIERCE ‘ ATTORNEY: Patented Nov. 22, i938 ’ “ 2,137,697 VUNlTED STATES PATENT orrlca MANUFACTURE OF’ WEATHER-STRIP ELEMENTS Robert 0. Pierce, Niles, Mich, assignor to Na tional Standard Gompany, Niles, Mich, a cor poration of Michigan Application March 30, 1935, Serial No. 13,979 (Cl. 154-1) 26 Claims. spring back when it leaves the machine. These rollers in themselves embody certain features of This invention relates to the manufacture of weather strips, especially those used for automo novelty, further described below. bile doors, and will be described as carried out with a novel machine which is adapted to op 5 erate continuously and automatically as long as Ii desired,'the core element so made may next be advanced to a novel mechanism which opens 5 up a slitted tubular cover, preferably of rubber, and then closes it about the core with the ?at supplied with the materials used. An object of the invention is to improve the weather strip by embodying therein a novel and inexpensive but effective resilient means for 1a yieldingly holding the weather strip in sealing wire loops projecting through the slltted side of the cover. The fabric cover may be secured about the i0 weather strip-by a sewing machine of any de sired construction, not necessary to be described engagement with its door. I prefer to use re silient wire, which can be wound rapidly and accurately about a suitable core‘ (of twisted tarred herein, as standard commercial sewing machines are adapted to perform this operation. The above and other objects and features of 15 the invention, including various novel construc paper or other material) in such a manner as 15 to form a_ series of fiat resilient loops approxi mately in the same plane at one side of the - tlons and operative steps and sequences, and va core. An element of this type preferably has mount ed thereon a slitted tubular cover (of rubber or ‘.29 the like) which embraces and incloses the core, ~ with the‘ flat ‘resilient wire loops projecting through the slitted side of the cover. Usually the entire weather-strip is'then'provided with a fabric cover, sewed or otherwise secured in rious important speci?c arrangements and rela tionships, will be apparent from the following description of the disclosure in the accompanye 20 ing drawings, in which: Figure .1_ is a top plan view of that part of the machine which applies the wire to the advancing core; Figure 2 is a side elevation thereof, looking 25 in the direction of the arrows 2-2 in Figure 1; loops to form a resilient ?ange by means of which Figure 3 is a partial section on the line 3--3 the weather strip is attached to the door frame of Figure 1, showing the drive means for the 25 place, and which cooperates with the ?at wire or other support. - Various features of the invention relate to the 30 structure of the described weather strip, and to the method of making it which has been de scribed above in general terms and which is hereinafter explained in detail; Other important features of the invention re 35-late to a novel machine for manufacturing the above-described weather-strip elements. In the preferred construction, the core is red length wis'e through an annular power-rotated member loop-compressing rollers; . - Figure 4 is a perspective view or the principal 30 operative parts of the machine; ’ I Figure 5 is a partial section on the line 5-5 of Figure 1, showing the means for tensioning the advancing core; ' - Figure 6 is ‘an elevation of an alternative con- 35 struction of wire-compressing - rollers; Figure 7 is a vperspective view of the iefthand rollers of Figure 6; ' Figure 8 is an elevation of an alternative form which carries a supply of wire, and which winds 40 the wire (under tension) continuously about the advancing core, and about a presser‘ foot or the like which is advanced at the same speed as the core in a path paralleling but spaced from the core, thus forming the enlarged loops described 40 of the rollers shown in Figure 7; Figure 9 is a side elevation of the core element as it would look when held by the rollers of 45 above. The presser foot may periodically, and preferably at a very much higher speed, be shifted machine; toward the core to disengage itfrom the wire and then returned to its starting point. The core with the wire so wound thereon then 50 advances to means, such as a novel series of rollers, for compressing the wire about the core ' and ?attening the loops into substantially thev same plane.- I prefer to stretch the wire about the core so tightly that it is stretched beyond 58 its elastic limit, so that-‘there is no tendency to' Figure 8,v before being released from those rollers; Figure 10 is a side elevation of the complete . ‘ 45 Figure 11 is a‘ diagram showing‘the successive addition to the core of the wire, the rubber cover, and the fabric cover; Figure 12 is a section through the ?nished weather strip, on the line l2-l2 of Figure 11; 50 Figure 13 is a partial section of a part of a door and its frame, with the door closed and sealed by the weather strip; _ -Figure 14 is a partial section thereof just be fore the door closes; and 55 2,137,097 Figure 15 is a sectional view of a slitting means for operating on the rubber tubing. ' Referring ?rst to Figures 11 to 14, the novel weather strip comprises a continuous elongated cordlike element or a ?exible core I8, of twisted l‘“ by relieving the pressure on the shoe 58. The upper cam.82 is removed in Figure 1, to avoid obscuring the parts below it, but is shown in detail in Figure 2. A suitable stop 'mecharusm of flat resilient loops I8 all approximately in the same plane. of any usual and desired type may be provided to stop the motor 12 if eitherlthe core I8 or the wire I2 should break. ‘ The rotating ring 52 winds the wire around the advancing core I8 and around a presser foot 84 or the like which is adjustably mounted on a 10 reciprocating slide 88 actuated by'a double cam A slitted tubular cover I8, of rubber or the like, encloses the core I8 and parts I4 of the cam 88 by a heavy ,tensioned coil spring 88. slitted side. A fabric cover 28-encloses the whole rier 82, best shown in Figure 4, which is mounted 15 tarred paper or the like, having formed thereon a resilient wire l2 parts I4 of which are com pressed (and' preferably stretched beyond the elastic limit ‘of the wire so they will not spring 10 back), and other parts of which are in the form 15 wire, with the loops I8 projecting through its 88. The slide 86 is held yieldably against the_ The slide 88 reciprocates as a plunger in a car weather-strip. It has a seam 22 quite close to at its lower end on a pivot 84 and which has the rubber cover I8, and may if desired have. a cam roller 88 engaging a double edge cam 88 driven in synchronism with ‘the cam 88. . one or more other seams where it projects out 20 wardly on opposite sides of the ?at loops I8, thus forming with said loops a resilient attach ing ?ange for the weather strip. ' _ A weather strip, made as described, may have its attaching ?ange tacked or otherwise secured 25 to the frame 24 of a door 28, ha manner well The cams 88 and 88 are both driven from a shaft I88 (Figure 4) operated by a sprocket gear 20 I82 driven by a sprocket chain I84 connecting it to another sprocket gear on the shaft 66, Thus the cams 88 and 88 ‘are driven in synchronism‘ with the wire carrier ring 52. The cycle of the presser foot 84 is: (1) it is 25 moved forward by cam 88 in a path paralleling but spaced from the advancing core I8 and] at known with weather strips of this type. It has the advantage over most weather strips, how ever, that the attaching ?ange resiliently urges the enlarged edge portion of the weather strip the same speed; > (2) it is moved by a suitable 30 into sealing engagement with the door. and there ‘spring (not shown) which holds roller 88 against the cam 88 a short distance toward the core I8, is no tendency to spring away from the door. to disengage it from the wire looped around it Referring now to Figures 1-5, the core I8 is by the carrier 52, this being permitted by the fed (from any desired'source such as the reel shape of cam 88; (3) it is moved at a very much 2'! shown in Figure 10) lengthwise, pastsuitable higher speed to the left in Figure 4, and then 86 guides 28 and 88, under a tensioning shoe 82 piv oted on a horizontal lever 84 urged by an ad justable spring 88 in a direction to grip the core frictionally against the guide 28. It is drawn under tension from this friction drag by rollers 88 and 48 further described below. . Between the shoe 82 and the rollers 88 is ar ranged a spool" carrying the wire I2, which passes from the spool through a guide 44 and over a guide roller 48 and thence one or more times around a tensioning roller 48 held by a friction shoe 88, which guides the wire as it is wound around the core‘ I 8. ’ back a short distance away from core I8, to its ~ initial position, ready to have the next loop of wire wound around it by the carrier 52. _ If desired, cam 88 may be formed to move the presser foot 84 slightly away from the core I8 at the right-hand end of its stroke, to stretch the wire looped around it and the core. With su?lcient tension on the wire from shoe 88, this stretching movement is not usually necessary. As pointed out above, on the return stroke of the presser foot 84 the tension on the wire may 45 be relieved by cams 82. _ The primary purpose‘ of cams 82 is to relieve the tension on the wire I2 when wire is fed most rapidly from the spool 42 and the tension The spool 42, the guide 44, the roller 48,. the tensioning roller 48, and the shoe I8, are all mounted on a rotatable annular member or ring roller 48. This occurs during the 180° of revo-' 82 (Figure 2) arranged with the moving core I8 lution of the rotating» ring 82 in which roller 48 at its axis. 'I‘hering 82 has enlarged sides or' ' moves on a path below a horizontal line through annular shoulders 84 rotatably seated on and the core I 8. During this portion of'the cycle a ‘ supported by three sets of anti-friction rolls 88 length of wire approximately equal to the length 55 supported on the machine frame 88. The cen of one of loops I8 is fed from the roller 48. The 55 release of tension on roller 48 prevents break age of the wire but su?lcient tension is main talned by a friction shoe‘l88 on spool 42 to pre horizontal drive shaft 88 driven by a belt pulley ' vent overrunning or withdrawal of the wire. No 88 or other suitable means. vAs‘shown in Fig breakage can occur under this tension because.‘ 60 ure 10, the pulley" may be connected by a belt the greater length of free wire is more resilient. drive .78 to an electric motor ‘I2 controlled by Two cams 82 arranged successively are shown. a switch or the like ‘I4. ' ‘ " tral part of member 82 is formed with gear teeth 88 drivably meshing with a sprocket chain 82 driven bya sprocket gear 84 (Figure 2) on a ‘The shoe 88 is carried by one arm of a three arm bell-crank lever 18 pivoted on the rotating ' ring 82., Av second arm of lever _'I8 is connected to a coil spring ‘I8, which is under substantial tension and which urges the-shoe downwardly. This constructiomgives a momentary tightening of wire I2 during the above-described half revo-> lution of ring 52 su?lcient to take up any slack 65 but not sumcient to cause breakage of the wire I 2. If desired these two cams may be replaced byv a single longer cam, thus relieving the ten The third arm of ‘lever, 18 carries a cam roller on the wire I2 over approximately the whole 88 which, at certain points in the machine cycle ‘ sion period of rapid feed. (e. g.,during the withdrawal stroke of the presser I prefer to provide the spool 42 with a fric - foot described below,- and during such time as tion shoe or drag I88 held by a spring I 88. If wire is "withdrawn most rapidly from the spool spring I 88 is light enough,-'\it will.not be neces 42) successivelyengages cams 82. shown as ad- _' sary to relieve the pressure on shoe I88 at any 75 Justably mounted on the machine frame, there time in the cycle;_ however, lever II8_ carrying 78 2,187,697 the shoe I06 is shown with a third arm so that gears ‘I38 and connected to the shaft. 68 by suit it may if desired carry a cam roller to engage a second stationary cam 82 (arranged in a dif ferent plane from the .cam 82 which controls shoe 50, so that each of shoes 50 and I00 is con trolled by its own cam only. The core, with the loops of wire formed around, it, nextpasses to the rollers 38, which have reg istering grooves receiving and embracing and‘ 10 compressing the core, and which crimp the loops able shaft-andfgearing connections I40. It will be seen without further description that the advancing core I0 ?rst has a series of wire ~ loops formed about it' and the vpresser foot 84, that these loops are crimped about the core by rollers 38, the loops are then ?attened by the rolls 40, and the cover I8 is next applied by rolls I30 and I34. The fabric cover 20, as tightly aboutthe core, stretching it preferably beyond its elastic limit so there will be little tendency to spring back. Referringto Figure 1 is will be seen that the 15 apex of each successive loop I6 is held by the presser foot 84 until said loop is completely through the rollers 38, before said presser foot returns to pick up the next loop already formed about its rearward portion. previously noted, is secured in place by standard sewing machinery. . ‘ If desired, a knife I50 (Figure 15) or the like, shown as heated by means indicated diagram matically as ‘an electric heating coil I52, may be mounted on the frame 58, with its point seated in a recess in a bullet-shaped guide I54 carried by a suitable bracket 456 secured to frame 58, the knife and the guide cooperating to slit the rubber tubing as‘ it passes from the reel I32 to I Figures 6 and 7 show an alternative form of the spherically-surfaced roller I30. roller made in two partsgfor manufacturing pur posesonly. Parts II! have the necessary regis tering grooves for the core, immediately beside which are crimping rolls I“ having intermeshing scribed in detail, it is not my intention to limit the scope of the-invention to that particular ma chine, or otherwise than by the appended claims. I claim: wedge-shaped projections'and depressions, form ing' in effect peculiarly shaped gear teeth for the purpose of catching and'holding each half of a 20 While one illustrative machine has been de _ 25 _1. A machine for making weather strips or the like comprising ‘means for making a core having loop~ IS in the proper'equi-angular relation with laterally-extending resilient means, ‘means for supplying a non-metallic tubular cover, means _ > . for progressively slitting said ‘cover along one 30 .In the casecf wire so highly tempered that it ‘side, means for progressively opening the tube does tend t6 sprin'g'back' as mentioned above,- I after it is slit, and means for applying said opened may substitute for rollers 38 the rollers shown in tube progressively to the side of the core opposite Figure 8. These rollers are similar to those said means and progressively closing said tube shown in Figures 6 and ‘7 with the exception that about the core with said core arranged insidethe 35 the arcuate surfaces II5 are not coaxial with tube and said resilient means projecting through the roller itself. This enables the rolls to crimp slitted side of the tube. V the wire above the core I0, past the desired final the . 2. A machine for making weather strips or the the axis of core I0. 30 position, as shown in Figures 8 and 9, so that when it does spring back slightly after leaving the crimping rolls the wire loops will be substan 40 tiallyin the same plane. After leaving the crimping rolls 38, the wired core passes between rolls 40. These rolls 40 also. have registering grooves embracing and. com pressing the core. At the side of these grooves 45 (the right side in Figure 2) these rolls 40 have approximately cylindrical portions which ?atten out the wire loops into substantially a single plane. Iv prefer to make these portions very slightly conical, so that the rolls are slightly closer together at the apexes of the loops than adjacent the core I0, for example about .0015 inch closer. This is too small a dimension to appear in a patent drawing, but it does insure that the apexes of the wire loops are properly ?attened , out. The rollers 38 have intermeshing pinions I2it (Figure 3) one of which is driven by .a shaft I22 having a worm wheel I24 driven by a worm gear I25 on the shaft 66. An idler I2I meshing with one of the pinions l20 drives somewhat larger pinions I26 operating the rolls 40. The core I0, so provided with a series of flat resilient wire loops along one side, may then pass 6 5 through a guide I28 which twists-it into a vertical plane, and thence over a spherically-surfaced like comprising means for feeding a core, means for applying a resilient wire thereto with portions 40 encircling said core and securing the wire thereto and. other portions projecting laterally in loops arranged approximately in the same plane, and means for assembling a tubular cover on said core 45 with said loops projecting outside said cover. 3. A machine for making weather strips or the like comprising means for feeding a core, and means for applying a resilient wire thereto with portions encircling said core and securing the wire thereto and other portions projecting laterally 50 in loops arranged approximately in the same plane. _ ' 4. A machine for covering cores having lat erally-extending resilient means comprising a feed roller having a curved surface and- arranged 55 to open up a slitted tubular cover, and rollers for closing said cover up again with the core inside and the resilient means projecting through the slitted side of the cover. I 5. A machine for‘covering cores having later ally-extending resilient ‘means comprising means constructed and arranged to open up a slitted tubular cover, and other means for closing said cover up again with the‘ core inside and the resilient means projecting through the slitted side 65 of the cover. 6. A method of making‘ a weather strip core roller I30 which opens up and feeds to it, from - member or the like comprising feeding a ?exible a reel I32 (Figure 10) or other suitable source, . core lengthwise under tension, feeding a presser the slitted tubular rubber'covering I8 previously Il described.- The, cover I8 is closed again about the corev I 0, with the wire loops projecting through the slitted side of the cover, by two grooved fold ing rollers I34. ‘Rollers I 34 may be mounted on vertical shafts I35 having intermeshing drive foot in a path paralleling but spaced from said 70 core, looping‘ a continuous resilient wire about said core and presser foot, and. compressing the wire loops at the core ends about said core leaving the other ends of said loops] projecting laterally from the core ‘in approximately the same ‘plane. 4 1 " 2,131,697 7. A method of making a weather strip ?'core member or the like comprising'feedingfa'?exible ‘ ment,‘ and means ‘for compressing the-wireabout core lengthwise intermittentlyfeeding-a presser said core with the portionsof the wire which foot in 'a pathv paralleling but spaced from said~ I encircled said element projecting at oneside of core and periodically thecore_ shifting the presser foot - toward the core and returning» it to its starting point, loopinga continuous resilient wire about said core and presser foot, and compressing the wire loops at the core ends about said core leaving the other ends of said loops projecting laterally from the core in approximately the same plane. 8. A method of making a weather strip core member or ‘the like comprising feeding a ?exible core lengthwise under tension, feeding a presser foot in a path paralleling but spaced from said core, looping a continuous resilient wire about said core and presser foot, and ‘compressing the ‘ wire loops at the core ends about said core in a I .. . > " I .. - 14. A machine‘ for making weather strip‘ ele ments or the like'comprising» means forvfeeding a core lengthwise, means for winding a- wire about the advancing core in loops much larger than the diameter of the cor , and means for compressing the‘ wire about said core with portions projecting in ?at loops at one side of the core.‘ 15. A machine for making Weatherstrip ele- ' ments or the like comprising means for feeding a core lengthwise, means for winding a wire about the advancing core in loops much larger than the diameter of the core, and means for compressing the wire about said core with portions projecting in ?at loops at one side of the core, said ,means including rollers having registering grooves em the core, and leaving the other ends of said loops projecting laterally from the ' core in approxi mately the same plane. ; 9. That method of making a weather strip ele ment which comprises winding a continuous wire about a moving core in a manner forming a series of loops much larger than the diameter of said core, and compressing said‘loops about the core leaving the excess wire projecting ‘in ?attened bracingand compressing the core with the en 20 circling wire and also having approximately cylin drical portions atone side of the grooves to ?atten said projecting loops. _ ' - 16. A machine for making weather strip ele ments or the like comprising means for feeding a 25 core lengthwise, means for winding a wire about the advancing'core in loops much larger than the diameter of the core, and means for compressing loops at one side of the core. the wire about said core with portions'projecting 10. That method of makingv a weather strip which comprises winding a continuous wire about comprising two pairs of ‘rollers arranged in series, a moving core in a manner forming a series of loops much larger than the diameter of said core, compressing said loops about the core leaving the excess wire projecting in, ?attened loops at one side of the core, placing a tubular covering about in ?at loops at one side of the core, said means 30 each pair having registering grooves embracing and compressing the core with the encircling, por tions of the wire. ' ‘ 17. A machine for making weather strip ele 35 ments or the like comprising means for feeding a core lengthwise, means for winding a wire about therethrough, and securing a fabric cover over . the advancing core in loops much larger than the said core with ' said ?attened loops projecting the tubular covering and over said ?attened loops. 11. A machine for making weather strip ele ments or the like comprising an annular power rotated member carrying a supply of resilient diameter of the core, and means for compressing the wire about said core with portions projecting in ?at loops at one side of- the core, said means ‘ of rollers arranged in series, 45 45 a path generally paralleling but spaced from said core and periodically shifted toward said core and then returned to its starting point at a speed much greater than its speed when advancing with the core, means whereby the rotation of said annular member winds wire from said source 50 about said core and presser foot, and means for _ compressing the wire closely about said core with the portions which encircled said presser foot projecting laterally from the core. 12. A machine for making weather strip ele in approximately the same plane. - ‘19. A machine for making weather strip ele ments or the like comprising rollers having regis . ments or the like comprising an annular power rotated member carrying‘ a supply of resilient wire, means for feeding a core lengthwise through said member, a presser foot intermittently ad--v vanced in a path generally paralleling but spaced , 70 from said core and .60 periodically shifted toward said core and then returned to its starting point, means whereby the rotation of said annular mem ber winds wire from said source about said core and presser foot, and means for compressing the wire closely about said ' core with the portions which encircled said presser foot projecting later-‘ ally from the/core. } - r 05 . - 13. A machine vfor making weather strip ele-‘ ments or the like comprising means for feeding a ‘core lengthwise, an element advanced in a path paralleling but spaced from said core, means for winding a wire about the advancingcore and ele .70 said other rollers having the approximately cylindrical portions formed on a ' slight taper so that they are closer together at the ‘side opposite said core. .> - 75 5 2,187,697 21. Means for compressing about a core a wire wound thereon in loops which are much larger than the diameter of the core, comprising rollers portions projecting laterally from the element. 24. A'machine of the class described compris ing means for feeding a cordlike element length» ' having intermeshing wedge-shaped projections wise, a part spaced iromsaid element as it is fed, and recesses formed to force one side of each loop of wire past the other side, to stretch the wire about said core, with the remaining portions of the loops projecting at one side of the core. 22. A machine for covering cores having later 10 ally-extending resilient means comprising means constructed and arranged to open up a slitted tubular cover, and other means for closing said loops about and at the side of said element and said part, and means to compress said loops to form ?at portions lying substantially in the same means for winding 8- wire in a series of connected plane. . 25. A method of making the article described which comprises feeding lengthwise a cordlike element, looping a continuous wire about said element and another element spaced from’ the cover up again with the core inside and the re- 1 ?rst element and compressing said loops to form silient means projecting through the slitted side 15 of the cover, together with cutting means ahead of the opening means arranged to slit the tubular ' cover lengthwise along one side. 23. A machine of the class described compris ing means for feeding lengthwise a continuous element, means for supplying wire, and, means for securing wire - supplied by said supplying means about and at one side .of said element in a series of loops larger than the element and which includes means to compress the loops to form ?at 15, ?at portions substantially in the same plane. 26. A method of making the article described which comprises 'feeding lengthwise a cordlike element, and looping va continuous wire about and at one side of said element in a connected series of flat loops and compressing saidloops to form ?at-"portions projecting laterally from the ' element. ROBERT C. PIERCE.