Abstract: A bag wherein in a first mode the mouth of the bag has a perimeter defined by the front panel and back panel and two sides of the bag closure. Strips at the mouth are not configured to close the bag in the first mode. The bag also has a second mode. This allows a second mode opening to the bag's containment region to be created. The perimeter of the second mode opening is defined by the two mutually engageable closure strips.

Abstract: A bag(1) to define a containment region for food, said bag formed of a multiply plastics film to define a front panel and back panel and being square or rectangular in shape wherein said side edges(12) and bottom edges(6) of each panel are sealed to each other said bag further comprising at said sealed bottom, a vent passage(2) to allow the escape of some fluid from the containment region of said bag during heating, the vent passage provided between said front and back panels where a region(5) of the internal most ply(4) of said multiply plastic film of at least one of said front or back panels is of a less or non-heat sealable nature to the remainder the material of the internal most ply at the sealed bottom.

Abstract: The invention provides an apparatus and a process for producing laminated materials. The process comprises the steps of: (a) supplying material from a first supply roller; (b) supplying materials from a system comprising a plurality of further supply rollers; (c) tracking lateral movement of the material leaving said first supply roller; and (d) adjusting the lateral position of said system in response to said lateral movement, such that the lateral alignment of the plurality of further supply rollers remains constant with respect to the material leaving the first supply roller. The adjustment step (d) may be manual, or it may be automatic e.g. in response to tracking in step (c) by means of an electronic sensor which tracks a control line on the material leaving the first supply roller. By maintaining constant lateral alignment, it is possible to manufacture laminated materials comprising a layer made from strips of material which abut but which do not overlap.