“It’s been a rough few months,” said Richard Swart, global sales and quality director at Berger Global, a Durham, England-based unit of Germany’s Rheinmetall AG that manufactures rings used to seal container drums. Sales in May and June fell between 20% and 40% depending on the industry being supplied, he said. Sales have since improved but remain sporadic, a sign of continuing uncertainty among customers, he said. “Everybody clings to the hope that there will be a vaccine, that’s the ultimate fix,” Mr. Swart said. STAY INFORMED Get a coronavirus briefing six days a week, and a weekly Health newsletter once the crisis abates: Sign up here . The outsize hit reflects the timing and duration of the U.K.’s nationwide lockdown. Britain locked down late […]