US 4,239,579 AGranted

Tire building drum

AssigneeThe Goodyear Tire & Rubber Company

InventorsGilbert A. Felten, Jean-Marc Dupommier

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Abstract

A tire building drum having radially expandable shoulder forming means and radially expandable bead seating means. The drum includes an independently operable pair of annular pistons associated respectively with the shoulder forming means and the bead setting means such that the shoulder forming means can be operated independently in time, in radial extent and in force applied, of the bead seating means. The latter is in like manner operable independently in time, in radial extent, and in force applied at the bead setting means. The foregoing abstract is not to be taken as limiting the invention of this application, and in order to understand the full nature and extent of the technical disclosure of this application, reference must be made to the accompanying drawing and the following detailed description.

Claims10

Dependent claims

A tire building drum having a center shaft and including a center membrane and an inflatable turn-up bladder having an elastic nose ring formed integrally thereof in close axially fixed relation to an associated end of the center membrane to form a flat cylindrical building surface;

a rigid drum end assembly including a mounting sleeve mounted coaxially on and slidable along the center shaft;
bead seating means arranged coaxially of and spaced circumferentially around said sleeve and mounted in said assembly to expand said elastic nose ring radially of the shaft;
drum shoulder forming means mounted in said assembly for movement radially of the shaft to expand said associated end of the center membrane adjacent to said elastic nose ring;
first means disposed coaxially of and around said sleeve for movement axially thereof to effect uniform radially outward force and movement of one of said bead seating means and said drum shoulder forming means independently of the other thereof;
and second means disposed coaxially of and around said sleeve for movement axially thereof to effect uniform radially outward force and movement of the other of said bead seating means and drum shoulder means independently of said one thereof.

2 more elements

Dependencies are inferred from the claim text.