Patent ID: 9573603
Date: 2017-02-21
CPC Classifications: B32B,B61D,Y10T

Claim:
1. A method of sealing a hopper car hatch comprising the step of: obtaining a sheet of plastic with self-contained adhesive with two lengthwise and two widthwise sides, wherein the self-contained adhesive is applied on one surface and along the two lengthwise sides of the plastic sheet; positioning the sheet of plastic over the hopper car hatch; and adhering the plastic to at least a portion of the hopper car hatch via (a) folding the two lengthwise sides over a rim of said hatch and adhering the self-contained adhesive to corresponding lengthwise sidewalls of the hatch and (b) locking the widthwise sides of the sheet to corresponding widthwise sidewalls of the hatch by folding excess adhesive portions of the lengthwise sides of the plastic sheet around ends of said lengthwise sidewalls of the hatch so that said excess adhesive portions are adhered to the widthwise sidewalls of the hatch, wherein said excess portions overlap on the widthwise sidewalls.