. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . Figure 68.—Horizontal Disc Double Seaming Machine. SHEET METAL WORKING MACHINERY 107 seaming roll, the proper setting and adjustment of theupright which supports the work being secured throughtrials and experiments. This horizontal disc double seaming machine, Figure68, will double-seam work of unusually large diameters,of material No. 22 gauge iron and lighter (U. S. Stand-ard), and of any depth u
. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . Figure 68.—Horizontal Disc Double Seaming Machine. SHEET METAL WORKING MACHINERY 107 seaming roll, the proper setting and adjustment of theupright which supports the work being secured throughtrials and experiments. This horizontal disc double seaming machine, Figure68, will double-seam work of unusually large diameters,of material No. 22 gauge iron and lighter (U. S. Stand-ard), and of any depth up to 36 inches. The machineis made in smaller sizes and lighter capacities, of differ- Front PartUpper Roll LowerRoll Rear PortUpper Double Seaming Roll —Lever. GearsHandCrank Tucking Wheel Figure 69.—Double Seaming Machine, Moores Patent. ent construction, but in principle they are nearly all thesame. Moores Patent.—The double seaming machine shownin Figure 69, known as Moores Patent, is more desir-able for general use, as the frequent changing of discs tothe nearest size of the vessel to be double seamed isunnecessary. The operation of double seaming is performed withthis machine in two steps, by engaging two parts of theupper roll. The first step throws the seam over part way, 108 SHEET METAL WORKERS MANUAL as shown in Figure 67 at B, and the second step finishesthe operation of double seaming as shown in the samefigure at C. The work to be double seamed is placed in the machineover the lower roll, and the lever that engages with theupper roll is thrown over to the left, which places the rearpart of the upper double seaming roll in position for thefirst step. A slight depression of the upper roll on thework is then effected by means of
Size: 1628px × 1534px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidsheetmetalwo, bookyear1918
