Class 6.

For Stitching Heavy Fabrics by Mechanical Power.

THE machines in Class 6 are designed especially for strong lock-stitch- ing. by mechanical power, of heavy fabrics of all kinds, not exceeding one inch in thickness.

The Oscillating Shuttle-motion is used on these, as on all other Singer Lock-stitch Sewing-Machines for operation by mechanical power for general manufacturing. Practical experience proves that this method produces the best results in combined ease, speed and capacity. It is the most effective stitch-forming mechanism, because it has no differential motion nor variablespeed, has less friction, requires less power and is more durable at high speed. It is the simplest and uses all kinds of thread to the best advantage.

The Feed and Shuttle used on the machines of Class 6 are of special size and form to secure the utmost efficiency in stitching heavy material requiring an unusually powerful feed and great capacity for thread. All machines of this class have a bed that is 254 inches long with 14 inches clear space from needle to base of arm.

These machines are in practical and successful use for stitching Heavy Canvas for Oil Strainers in Oil Refineries, sewing Harness, Carriage Tops and Cushions, Sails, etc.

Referring to the different varieties, Machines No. 6-1 and No. 6-2 are fitted with Wheel-feed, and Machines No. 6-3 and No. 6-4 with Drop-feed, all four having plain presser, either roller or flat. Machines No. 6-1 and No. 6-3 are driven by a flat belt running over tight and loose pulleys with belt. shifter on the machine, and Machines No. 6-2 and No. 6-4 have the Singer Friction Driving attachment. Machines No. 6-9 and No. 6-10 have vibrating presser; Machine No. 6-9 is provided with Friction Driving attachment, and Machine No. 6-10 with tight and loose pulleys and belt-shifter.

The Vibrating Presser, acting on two or more plies of material, serves to prevent the lower plies from being carried forward faster than the upper ones by the action of the feed; it is especially effective for book stitching and rough, uneven or adhesive surfaces, also on soft goods liable to pucker.

'The above illustration shows a modification of the No.6 Machine especially adapting it for the stitching of Sweat Pads, or similar forms contain- ing a mass of soft or fibrous material to be quilted or otherwise strengthened or secured.

Four regular styles of machines are made for the purpose named, but differing in the form of feed, as best suited to the work to be performed, and also in the method of communicating motion. No. 6-5 and 6-6 have Wheel-feed, and No. 6-7 and No. 6-8 have Drop-feed. No. 6-5 and No. c-% are operated by flat belt running over tight and loose pulleys on the machine and are provided with belt-shifter, which may be operated by means of a treadle or by the hand. No. 6-6 and No. 6-8 have the Singer Friction Driving attachment, as illustrated above.

The Vibrating Presser on these machines, as constructed in regular course, has a lift of one and three-quarters inches from the bed; it moves forward at each stitch in conjunction with the feed and is then automatically lifted and returned to its former position, thus preventing any pushing back of the upper portion of the material.

The vibrating presser is aided by an auxiliary presser attached to and working in conjunction with the needle-bar, pressing the soft material down so as to give free action to the vibrating presser, and fully protecting the needle from being caught or sprung out of place.

The shape of the auxiliary presser-foot may be modified to suit the work to be performed.

The length of stitch is adjustable, and has a range up to one inch. The stitching capacity of this machine covers any work of the class described.

The machine may be modified and adapted for special requirements, and has been successfully used for the manufacture of small Mattresses and similar work, by increasing the height of lift to the presser.

FOR THE MANUFACTURE OF BUFFING WHEELS, ETC.

The machines of Class 6 are adapted for strong lock-stitching in parallel circles or in a continuous spiral, at one operation, of a number of plies of material up to an aggregate thickness of one inch. They are used for the manufacture of Cotton or Leather Buffing Wheels and work of a similar character.

Machine No. 6-12, with drop-feed and vibrating presser, has an attachment for guiding the material to make ciRcuLaR rows of stitching, finch apart, and is provided with tight and loose pulleys and belt-shifter, as illustrated above. Machine No. 6-11 is precisely similar, excepting that it is provided with the Singer Driving attachment.

The following is lifted from John Langdon's Comprehensive Model List

6- (class)		Industrial	For heavy work in cloth, leather or paper. Lock stitch. Long beak oscillating cylinder shuttle. Drop feed. Bed 25 1/4" long by 10" wide. Space at right of needle 14".
6D		Industrial	Single thread chainstitch for blindstitching; curtains, drapes, etc. Cylinder diameter 2 9/32"; swing-out work plates for flat or tubular work. Oscillating looper. 3 to 8 stitches per inch. Speed 2500 spm.	Cat. 7425-61 also 3690 (short point) or 7425 (long point)
6SS		Industrial	Single thread chainstitch for blindstitching; curtains, drapes, etc. Cylinder diameter 2 9/32"; swing-out work plates for flat or tubular work. Oscillating looper. 3 to 8 stitches per inch. Speed 2500 spm.	Cat. 7425-61 also 3690 (short point) or 7425 (long point)
6-1		Industrial	Bed 25 1/4" long. 14" to right of needle. Oscillating shuttle. Ratchet wheel feed, roller or flat presser; belt shifter for flat belts. For cloth or leather up to 3/4" thick; harness work, flat belting, etc.	6x1 or 6x2; 6x3 or 6x4
6K1	1893- ?	Industrial
6-2		Industrial	As 6-1 with Singer driving attachment (SDA).	6x1 or 6x2; 6x3 or 6x4
6K2	1893- ?	Industrial
6-3		Industrial	Drop feed - otherwise as 6-1. Oscillating, long beak shuttle. Roller or flat presser and belt shifter for flat belts. Speed 400. For cloth or leather up to 3/4" thick; belting; harness work, etc.	6x1 or 6x2; 6x3 or 6x4
6-4		Industrial	As 6-3 but with SDA.	6x1 or 6x2; 6x3 or 6x4
6-5		Industrial	Ratchet wheel feed, vibrating and assisting presser; belt shifter for flat belts. For quilting sweat pads up to 1 1/2" thick.	6x5
6K5	*	Industrial	*(Cancelled post-1944)
6-6		Industrial	As 6-5 but with SDA (Singer Driving attachment)..	6x5
6-7		Industrial	Drop feed - otherwise same as 6-5. Vibrating and assisting pressers; foot lifter. Speed 80. For quilting sweat pads up to 1 1/2" thick.	6x5
6-8		Industrial	Drop feed; vibrating and assisting pressers; foot lifter. Speed 80. For quilting sweat pads up to 1 1/2" thick. As 6-7 but with SDA.	6x5
6K9		Industrial	Overseaming - for stitching tents, wagon covers, tarpaulins, etc. Intended to be placed on a stand beside a travelling table of any required length, mounted on wheels and running upon a specially prepared track. Instantly changed from overseaming to straight sewing. The machine head (net) weighs 281 lbs!
6-9		Industrial	Drop feed, vibrating presser and SDA. Speed 200. Stitch length 1/4" to 1”. Has shuttle No. IDD80. For stitching blank books etc. up to 3/4" thick.	6x2 or 6x4
6K10		Industrial	As 6K9 but not fitted for travelling table.
6-10		Industrial	As 6-9 but with belt shifter.	6x2 or 6x4
6-11			Drop feed, vibrating presser with attachment for guiding buff wheels to make circuler rows of stitching 3/8" apart. With SDA.
6-12	*	Industrial	Makes circular rows of stitches 5/16” between rows (unless ordered differently). Drop feed, vibrating presser and belt shifter for flat belt. Speed from 400 to 450. For stitching buff wheels for polishing. *(In catalog 10/1952)	6x1
6-14		Industrial	For buff wheels up to 5/8" thick and 18” diameter. Makes circular rows of stitches 1/4" to 1/2" between rows as ordered. Drop feed, vibrating presser and SDA.  Speed 200.	6x1
6-15		Industrial	A 6-14 but with belt shifter. (In catalog 10/1952)	6x1
6-16		Industrial	For stitching buff wheels not more than 3/4" thick and 18” diameter. Has attachment underneath bed for making spiral rows of stitching from 1/4" to 1/2" apart (as ordered). Drop feed, vibrating presser, 3 inch cylinder shuttle and belt shifter.  Speed from 400 to 450. (In catalog 10/1952)	6x2
6-17		Industrial	As 6-16 but with SDA (Singer Driving Attachment).	6x2
6-19		Industrial	For stitching books up to 1 1/2" inches thick. Length of stitch 1 to the inch; clearance under presser foot 5/8 inches. Alternating pressers. Drills  hole before stitch is made. Speed 80 to 120 RPM.	6x15
6-20		Industrial	For stitching books and heavy materials up to 3/4" thick. Clearance under presser foot = 7/8". Makes 1 to 4 stitches per inch. Vibrating presser; SDA; Shuttle 134058. Speed 200.