USRE4776E - Improvement in pistons for printing-presses - Google Patents
Improvement in pistons for printing-presses Download PDFInfo
- Publication number
- USRE4776E USRE4776E US RE4776 E USRE4776 E US RE4776E
- Authority
- US
- United States
- Prior art keywords
- pistons
- presses
- printing
- piston
- improvement
- Prior art date
Links
- ALYNCZNDIQEVRV-UHFFFAOYSA-N 4-Aminobenzoic acid Chemical compound NC1=CC=C(C(O)=O)C=C1 ALYNCZNDIQEVRV-UHFFFAOYSA-N 0.000 description 2
- 241000557622 Garrulus glandarius Species 0.000 description 2
- 241000220010 Rhode Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002459 sustained Effects 0.000 description 2
Images
Definitions
- Figure 1 is a longitudinal section of apart of a printing-press on the line aa: of Fig.2, showing my improvement.
- Fig.2 is a horizontal section.
- Fig. 3 is a section through the piston on the line y y of Fig. 4.
- Fig. 4 is a section on the line 2 z of Fig. 3 5 and
- Fig. 5 is a side elevation of the piston.
- A represents the cylinders
- B the pi stons employed in these presses to effect the. stoppage of the table by the compressionof the air in the cylinders behind the pistons.
- the pistons have been solid, or, at least, so unyielding that the paper falling in front of a cylinder so as to be forced into it would pack so hard as to stop the press, requiring great force to release the'piston, and sometimes breaking thecylinder and other parts.
- This I port therefor arranged on the periphery of disk F, and sustained a considerable distance therefrom by the radial coiled springs H, or in an y other way, so that the said spriiigG or other device or devices used instead may have considerable movement radially when required.
- the coiled flat spring G may be sufliciently strong to hold the elastic packing against the cylinder with suiiieient pressure without the aid of the springs H, which will be needed kind be used instead of the spring G.
- the flexible packing D will be contracted a little at the side of the piston which enters the cylinder first, as shown at K, toprevent catching on the rim ot the cylinder, and the latter will be reamed out, as at I, for the same object.
- I have represented springpins L, attached to the side of the piston for holding the spring G from escaping by their radial points passing through a flange of the disk F and projecting in front of the edge of said springs.
- the pistons will be provided with a valve, M, to "admit air behind them, when withdrawing, to supply the place of that escaping past the packing when the piston goes in, toprevent the action of a vacuum against the piston when withdrawing.
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