<P> St. Louis baker Gustav Papendick bought Rohwedder's second bread slicer and set out to improve it by devising a way to keep the slices together at least long enough to allow the loaves to be wrapped . After failures trying rubber bands and metal pins, he settled on placing the slices into a cardboard tray . The tray aligned the slices, allowing mechanized wrapping machines to function . </P> <P> W.E. Long, who promoted the Holsum Bread brand, used by various independent bakers around the country, pioneered and promoted the packaging of sliced bread beginning in 1928 . In 1930 Wonder Bread, first sold in 1925, started marketing sliced bread nationwide . </P> <P> As commercially sliced bread resulted in uniform and somewhat thinner slices, people ate more slices of bread at a time, and ate bread more frequently, because of the ease of eating another piece of bread . This increased consumption of bread and, in turn, increased consumption of spreads, such as jam, to put on the bread . </P> <P> During 1943, U.S. officials imposed a short - lived ban on sliced bread as a wartime conservation measure . The ban was ordered by Claude R. Wickard who held the position of Food Administrator, and took effect on January 18, 1943 . According to The New York Times, officials explained that "the ready - sliced loaf must have a heavier wrapping than an unsliced one if it is not to dry out ." It was also intended to counteract a rise in the price of bread, caused by the Office of Price Administration's authorization of a ten percent increase in flour prices . </P>

When was sliced bread introduced in the uk