Abstract: Molten waste glass and rejected hot glass bottles from glass moulding processes are flattened in an apparatus comprising two rollers independently driven for rotation in opposing directions and having a gap therebetween through which the hot glass fed to the apparatus can be flattened, the two rollers being urged towards each other in normal operation at least one of the rollers being pivotally mounted. In order to prevent jamming of the apparatus there are provided means for swinging the pivotally mounted roller away from its normal operating position in the event of a foreign object being accidentally dropped into the apparatus and in the event of a power failure. Also there may be provided with a cam such that by rotation of the cam the pivotally mounted roller can be moved and the normal operating gap between the rollers altered. The gap between the rollers can be altered according to the rate of glass feed, the nature of glass fed to the apparatus and the required size of cullet granules.