Needle And Presser Foot Area - Singer 7640 Instruction Manual

ONE STEP BUTTONHOLE LEVER automatically determines the length of the buttonhole when
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lowered. (See Page 26)
NEEDLE THREADER LEVER is used to engage the automatic needle threader mechanism.
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NEEDLE THREADER GUIDE holds thread securely before placing it in hook pin.
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PRESSER BAR accommodates the presser foot holder.
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PRESSER FOOT SCREW secures the presser foot holder (shank) onto the presser bar.
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PRESSER FOOT holds fabric against the feed teeth while sewing. Various optional presser feet
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are available, depending on fabric sewn and sewing techniques. (See Page 11)
FEED TEETH (OR FEED DOGS), which look like rows of teeth under the presser foot, control the
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movement of the fabric under the presser foot.
NEEDLE PLATE covers the bobbin area and provides at area around presser foot for sewing.
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THREAD GUIDE controls movement of upper thread.
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10. NEEDLE CLAMP SCREW secures the needle when placed in needle clamp.
11. NEEDLE CLAMP holds the machine's needle in position.
12. NEEDLE holds thread during stitch formation.
13. LOCK IN PLACE BUTTON helps with even feeding over extra thick seams.
14. PRESSER FOOT HOLDER (OR SHANK) holds presser foot.
15. STITCHING GUIDELINES are used as a visual reference for guiding fabric straight while sewing.
The rst line is 3/8" (10mm) from center needle position. The most popular seam allowance
measurements are 1/2" (13mm) and 5/8" (16mm). The 1/2" seam allowance is the 2nd line, and
the 5/8" seam allowance is the 3rd line from center needle position.
ABOUT YOUR MACHINE

Needle and Presser Foot Area

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