Abstract: A method of attaching a metal end (7) to a metal container body (6) in order to close an opening in the body, wherein the body (6) has a curled lip at least partially surrounding the opening and the end (7) has an upstanding lip extending at least partially around a periphery thereof. The method comprises locating the end (7) within the body (6) at or near said opening, bringing a curling tool (8) into contact with said upstanding lip of the end (7) and applying a force to that lip, via the curling tool (8), in order to curl the upstanding lip around the curled lip of the body (6) to form interlocking curls.

Abstract: A method of attaching a metal end (7) to a metal container body (6) in order to close an opening in the body, wherein the body (6) has a curled lip at least partially surrounding the opening and the end (7) has an upstanding lip extending at least partially around a periphery thereof. The method comprises locating the end (7) within the body (6) at or near said opening, bringing a curling tool (8) into contact with said upstanding lip of the end (7) and applying a force to that lip, via the curling tool (8), in order to curl the upstanding lip around the curled lip of the body (6) to form interlocking curls.

Abstract: A computer including a base and a member superposed over the base and movable with respect to it. The base may be a card and the member may be a continuous flexible band surrounding the card. The band is slidable along the length of the card and also movable in the direction of its continuity. A series of dates, each including a month and day, is carried by one of the base and member, and a series of numbers is carried by the other. The dates are arranged in day-by-day sequence, and the numbers are in sequence with each successive number being larger than the one immediately previous to it by the amount of one day's fine. When the zero position of the sequence of numbers is moved opposite to the current date, the number adjacent the date on which a book was due will be the amount of the late fine.