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US 5,237,942 AGranted
Overlock sewing machine having upper and lower looper thread takeup lever drive mechanisms
AssigneeJuki Corporation
InventorShiro Satoma
Life of this patent
Estimating the term…
Abstract
An overlock sewing machine which is arranged such that a lower thread take-up lever is disposed independently of an upper looper thread take-up lever and that a lower looper thread take-up lever drive mechanism is fabricated independently of an upper thread take-up lever drive mechanism and adapted to connect thereto an adjust means for adjusting the amount of thread fed from the lower looper thread take-up lever.
Claims5
An overlock sewing machine comprising:
- a lower looper thread take-up lever;
- an upper looper thread take-up lever, wherein said lower looper thread take-up lever is disposed independently of said upper looper thread take-up lever;
- a lower looper thread take-up lever drive means for swinging said lower looper thread take-uplever;
- an upper looper thread take-up lever drive means for swinging said upper looper thread take-up lever independently of said lower looper thread take-up lever independently of sid lower looper thread take-up lever by said upper looper thread take-up lever drive means;
- and
- an adjusting means attached to said lower looper thread take-up lever drive means, wherein said adjusting means adjusts an amount of thread fed from said lower looper thread take-up lever.
3 more elements
AN overlock sewing machine comprising:
- an upper looper supplied with an upper looper thread and a lower looper supplied with a lower looper thread;
- a main shaft;
- motor means;
- a linkage means linking said motor means and said main shaft so that the main shaft is rotated by the motor means;
- an upper looper drive means linked to said upper looper and said main sahft for driving said upper looper responsive to movement of said main shaft;
- a lower looper drive means linked tos adi lower looper and said main shaft for driving said lower looper responsive to movement of said main shaft;
- a first take-up member connected to said upper looper drive means for engaging with said upper looper thread to take out said thread;
- a second take-up member for engaging with said lower looper thread to take out said thraed, wherein said second take-up member is driven by said main shaft independently from said first take-up member;
- and
- an adjusting means connected to said second take-up member for controlling the drive of said second take-up member, whereby said second take-up member takes out a predetermined value of said lower looper thread depending on the selected stitch formation.
7 more elements
An overlock sewing machine as claimed inc laim 2, further comprising:
- a driving mechanism linking said second take-up member and said main shaft for driving said second take-up member by movement of said main shaft;
- and
- a release means connected to said upper looper drive emans for disengaging the linkage between said first take-up member and said main shaft.
Dependencies are inferred from the claim text.