Industrial Sewing Machine
Company, Inc.

• Improper alignment of bobbin case into hook assembly allows bobbin case latch to swing open.

• Swollen or spread bobbins prevent proper latching of bobbin case into hook assembly.

• Bent bobbin case prevents bobbin case from latching  securely into hook assembly.

• Foreign substances present around the basket center post prevent the bobbin case from securely latching into the hook assembly.

• Breakage of bobbin case
• Hook Jamming and/or burnout
• Breakage of needle
• Needle bar timing movement
• Throat plate damage
• Moving knife damage
• Large amounts of downtime

• Immediate cutting of needle thread before thread can be entangled around bobbin case latch.
• Ergonomically designed non-slick inner latch surface allows easy replacement of bobbin case.