Abstract: In the production of edible ice bodies moulded and frozen in moulds it is required to convey heat to the outsides of the moulds in order to enable a demoulding of the bodies upon release thawing thereof, this traditionally being effected through warm water. With the invention it has been realized that for both the production and the quality of the ice bodies there are important advantages connected with the use of hot steam for the release thawing.

Abstract: A method and an apparatus for determining the relative air or gas content in a product flowing through a conduit. By means of two substantially synchronized pistons moving in opposed cylinders, a sample of the product is transferred from the conduit to a sampling chamber defined in one of the cylinders between the pistons. After the sample has been isolated from the material flowing through the conduit, the pistons are moved towards one another whereby the volume of the sampling chamber is reduced to a predetermined value. The compression of the sample results in an increased pressure, and when the pressure has reached a predetermined value, an overflow valve is opened to let excess material flow from the sampling chamber back to the conduit. When the movement of the pistons towards one another has stopped and said predetermined pressure has been established in the sample, a predetermined expansion of the sample is effected by moving the pistons a predetermined distance from one another.