New processes lead to growth
By the mid-1950s, the logistics of producing as many as 6,000 bagels for sale on Sunday morning, in contrast to relatively low activity the rest of the week, began to demand a solution. As a result, in 1954 Lender perfected a method of freezing the bagels, so that the labor could be spread more evenly throughout the week.[4] He kept this process a secret, but after two years, the bakery accidentally delivered frozen bagels, and the secret was revealed. Customers were initially angry, but were won over, when they realized that these were the same bagels they had been satisfied with for the previous two years. The New York Bagel Bakery started to market the frozen bagels, including delivery outside New Haven, for instance to resorts in the Catskills that were popular among Jews.[2]
Lender developed further refinements, such as pre-slicing the bagels and packing them in polyethylene bags to keep them fresh after thawing. The bakery began selling the packaged frozen bagels in supermarkets. To introduce bagels to an unfamiliar public, the Lender family would prepare and distribute them in supermarket aisles. The plastic bagged, frozen six pack of pre-sliced Lender's Frozen Bagels began to gain market share, and by 1959 supermarket sales accounted for half of the sales.[5] His business created new varieties of bagels, and production was switched to rotary ovens, rather than the labor-intensive open, flat ovens.[2]
In 1960, Harry Lender died. His sons Sam and Murray, who had been running the bakery with him, continued. (The oldest son Hyman had previously left the family business.) When youngest son Marvin graduated from college, he became a partner as well, and shortly thereafter Sam retired. The two brothers teamed up to expand operations, with Marvin managing the bakery and Murray in charge of sales.[2]
In 1963 the Lenders leased the very first Thompson Bagel Machine, invented by Daniel T. Thompson. Until then, according to Thompson: "Sam Lender mixed the bagel dough and one man cut it into small slabs and fed it into an Italian breadstick machine. The Italian breadstick machine made bagel dough strips that were then distributed to workstations where six to eight men rolled them by hand into bagels. With this system they averaged 50 dozen bagels per hour per man. The first Thompson machine, with three unskilled workers, was able to do the work of eight skilled workers.[6]"