ELNA Transforma - Page 29

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TheThreadReleasehastwostops,theadjustableGuardRing
StopandaStoptabandnotchintheframeoftheThread
Release.
TheShuttleBeakattachedtotheupperandlowerguard
ringshastwoStoppoints(showninRED),oneoneitherside
oftheneedle.
TheThreadReleasestopsengagewiththeShuttleBeak
stops,whichpreventstheGuardRingsfromturningwiththe
rotatingShuttleHook.
TheThreadReleasestopsareatdifferentheights,which
alternatelyengagetheShuttleBeakstopsastheThread
Releasepivotsup‐and‐down.
TheThreadReleasebeginstoriseastheshuttlehookpasses
undertheShuttleBeakandapproachestheneedle,
disengagingtheGuardRingStopwithShuttleBeak.
TheShuttleHookisthenabletocatchtheupperthreadloop
andpassitundertheGuardRingStopasitwrapstheloop
aroundtheshuttle.
TheStopnotchholdsbacktheShuttleBeak,whiletheGuard
RingStopissituatedhigherthantheShuttleBeak.
AstheShuttleHookcompletesabouthalfaturn,theThread
Releasebeginstolower.
AstheShuttleHookcompletesaboutthreequartersofaturn,thethreadTake‐upLeverpullstheupperthread
loopofftheshuttlehook.
TheThreadReleasedescendstoengagetheGuardRingStopwiththeShuttleBeak,anddropthenotchStop
belowtheShuttleBeak.
TheupperthreadloopcannowpassbetweentheStopandtheShuttleBeaktoexittheshuttle.
Eachstitchrequiresonedownandupcycleofthe
Needlea
ndTake‐upLever.
HowevertheShuttleHookmustmaketwocomplete
revolutionsandtheThreadReleasemakestwoup
anddowncyclestocompleteastitch.
ThefirstrevolutionoftheShuttleHookistowrapthe
upperthreadlooparoundlowerbobbinthread.
ThesecondrevolutionoftheShuttleHookistoallow
theTake‐upLevertopullthethreadstightto
completethestitch.
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