Seam′ing-ma-chine′.
A machine for forming the joints at the edges of sheet-metal plates.
In that shown,
Fig. 4790, this is effected by placing the work on a
former at the top of a mandrel in the horizontally adjustable shaft
a and bringing down upon it the rotating head
b, journaled in a casing, the upper part of which is hinged, on top of the standard
c. A screw
d forces the head tightly down on the seam, and by turning the handle
c it is caused to rotate, carrying with it the former
f, pressing the two parts firmly, and closing the seam.
See also double-seaming machine; roof-seaming ma-chine.
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Seaming-machine. |
In
Fig. 4791, when the cylindrical part of the can is formed and the flange turned upon the bottom, the seam is completed by the grooved rotaryroller
A and adjustable rotary pressure-head
E. The pressure-head is drawn downward by a treadle and raised by a spring.
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Seaming-machine. |
In
Fig. 4792, the bottom of a pan or other vessel is struck up between the dies
a b, and united to the body by a single pressure between two rollers of proper shape to close the seam, forming the joint shown at
c. Other methods of performing this operation, and the seams produced thereby, are seen at
d e f g h i k. See also stamping-machine; Strik-ing-machine.
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Seaming sheet-metal ware. |
Fig. 4793 is another form of seaming-machine, in which the upper axis, carrying the flanging-roller
l, is depressed by turning the handscrew
r, depressing the tin plate into the groove of the roller
d. The axis
c is then turned by the handle
k′ spinning up the edge of the tin plate as it passes between the two rollers.
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Tinman's seaming-machine. |
