Elevator car
AssigneeKone Corporation
InventorsKari Soljamo, Matti Räsänen, Mika Alvesalo, Mikael Alanen
Life of this patent
Estimating the term…
Abstract
The elevator car includes a floor, a ceiling, and side walls connecting the floor and the ceiling. At least the inner surface of at least some of the side walls of the elevator car may be covered with sheets of board. The board includes a fire retardant plywood having a front surface and an opposite back surface. The front surface of the fire retardant plywood may be coated with a first material layer including a fire retardant laminate. The fire retardant laminate may be attached with heat resistant or fire retardant glue to the fire retardant plywood. The back surface of the fire retardant plywood may be coated with a second material layer having a same thickness and a same material properties as the laminate.
Claims13
An elevator car, comprising:
- a floor;
- a ceiling;
- and
- side walls connecting the floor and the ceiling, wherein
- at least an inner surface of at least some of the side walls of the elevator car are covered with sheets of board including a fire retardant plywood having a front surface and an opposite back surface,
- the fire retardant plywood includes a plurality of veneer sheets, in which each veneer sheet has been separately impregnated with a fire retardant solution before bonding the plurality of veneer sheets together in a heated press with a heat resistant or a fire retardant glue applied to both sides of each of the plurality of veneer sheets to form the fire retardant plywood, the fire retardant plywood having a thickness in a range of 5 to 8 mm,
- the front surface of the fire retardant plywood is coated with a first material layer of a fire retardant laminate, the fire retardant laminate including a melamine impregnated decorative paper combined with a fire retardant phenolic treated kraft paper, the fire retardant laminate having a thickness in a range of 0.4 to 1 mm, said fire retardant laminate being attached with the heat resistant or the fire retardant glue to the fire retardant plywood and the back surface of the fire retardant plywood is coated with a second material layer having a same thickness and same material properties as the first material layer, and
- the heat resistant or the fire retardant glue is a two-component glue based on a phenol resorcinol and a formaldehyde hardener, or a melamine-formaldehyde.
Dependencies are inferred from the claim text.