‘‘Time is running short and the owners are not prepared to operate under this collective bargaining agreement for another season, so we need to get to making a deal and doing it soon,’’ Bettman said after the two sides met at the league headquarters in New York.

When asked if Sept. 15 is a hard deadline, Bettman said, ‘‘Our efforts are going to be devoted to trying to make a deal.’’ He then reiterated his previous statement that owners aren’t prepared to operate under the current system.

Saying a ‘‘wide gap’’ still existed between the two sides on numerous issues, Bettman added the potential for a lockout is something the NHL Players’ Association has been aware of for much of the past year.

NHLPA executive director Don Fehr referred to the split as ‘‘a meaningful gulf.’’

Fehr returned to the negotiating table after a trip to Europe, where he met with players in Moscow and Barcelona.

The NHLPA head did not have an immediate response to Bettman’s comments, because he spoke before the commissioner made himself available to reporters. Fehr did reiterate the union is open to continuing talks beyond Sept. 15 if no deal is reached, and entering the season under the current system.

‘‘Under the law, if an agreement expires, that may give someone the legal ability to go on strike or impose a lockout,’’ Fehr said. ‘‘There’s no requirement that they do so, and if nobody does anything, you continue to work under the old conditions until they do change. So if there’s a lockout, somebody has to choose to do this.’’

Talks are scheduled to continue Friday in New York, before shifting to the union’s headquarters in Toronto next week. That’s when Fehr expects to make a formal counteroffer to the league’s initial proposal.

The union did make a presentation to the NHL Thursday, outlining some of its economic positions in response to what the league has put on the table.

The NHL is proposing to cut players’ share of revenues from 57 percent to 46 — and that percentage drops to 43 when taking into account revenues the NHL deems should not be shared with players. That would translate into as much as a $450 million shift in revenue in the owners’ favor.

The league is also seeking to restrict free agency on several fronts. That includes limiting length of contracts to five years (there are currently no limits in place); lengthening the time a player must wait to be eligible to become an unrestricted free agent from seven years to 10; and eliminating players’ rights to salary arbitration.

Fehr said the NHL is essentially asking its players to pick up all the costs in a new deal. He also questioned whether NHL teams have any desire to share revenues among themselves to maintain a level of parity.

Butler signs with NJ

The New Jersey Devils signed former New Hampshire forward Bobby Butler to a two-way contract. Details weren’t disclosed. In two seasons with the Senators, he had 16 goals and 21 assists in 94 games. In four years at UNH, he had 61 goals and 60 assists in 153 games . . . The Maple Leafs signed forward Tyler Biggs to a three-year, entry-level contract. The 19-year-old from Loveland, Ohio, was Toronto’s first-round draft choice in 2011 and played for Miami University last season.