 SHELTON, Conn., July 22, 2021 GLOBE NEWSWIRE -- Acme United Corporation NYSE American: ACU today announced that net sales for the quarter ended June 30, 2021 were 44.8 million compared to 44.0 million in the second quarter of 2020, an increase of 2. Net sales for the six months ended June 30, 2021 were 88.4 million, compared to 79.8 million in the same period in 2020, an increase of 11. 