초록 ▼

A zip-fastener on each side of a working sail, for example a mainsail, makes it possible to remove from the effective area of the sail an elongated triangular area with its apex at the top and one side of it disposed close to the luff. In one embodiment the zip-fastener on one side has one tape clos

A zip-fastener on each side of a working sail, for example a mainsail, makes it possible to remove from the effective area of the sail an elongated triangular area with its apex at the top and one side of it disposed close to the luff. In one embodiment the zip-fastener on one side has one tape close to and parallel to the luff and another tape extending from the head of the sail to a point on the foot spaced from the luff by up to about 40% of the length of the foot of the sail, while on the other side of the zip-fastener, which likewise extends downward from the head of the sail, has a forward tape that runs down to a location at the foot of the sail about mid-way between the fastener tapes at the first mentioned side of the sail and an aft tape which extends to near the foot of the sail at a location spaced aft of the aft tape of the first mentioned fastener, so that the aft tape of the first mentioned fastener is about mid-way between the fastener tapes of the aft fastener. Reefing and unreefing lines for each fastener are provided for moving the fastener slide down and up. In another embodiment both zip-fasteners are placed on opposite sides of the sail with a forward tape stitched to a double-liffed portion of the sail which gets progressively wider from the headboard down to the foot. The two zip-fasteners are in this case equidistant from the mast and the unused part of the narrowed sail goes into a pocket.

대표청구항 ▼

A vertically zip-reefable working sail for a sailboat, said sail having a head, a tack and a clew, a luff extending from the head to the tack, a leech extending from the head to the clew and a foot extending from the tack to the clew, and further comprising: a first zip-fastener on a first side of t

A vertically zip-reefable working sail for a sailboat, said sail having a head, a tack and a clew, a luff extending from the head to the tack, a leech extending from the head to the clew and a foot extending from the tack to the clew, and further comprising: a first zip-fastener on a first side of the sail having a fastener slide and a forward fastener tape extending from the head of the sail to the foot on a course which is close to and at a substantially constant spacing from the luff of the sail and an aft fastener tape extending from the head of the sail towards a first location on the foot of the sail which is spaced from the foot end of said forward fastener tape by between 15% and 40% of the length of the foot of the sail, said aft fastener tape extending towards said location on the foot of the sail for a distance not substantially less than the length of said forward tape; a second zip-fastener on the second side of the sail having a fastener slide and forward fastener tape extending from the head of the sail to a second location at the foot of the sail which is approximately mid-way, or slightly closer to the luff than mid-way, between the foot end of said forward fastener tape of said first zip-fastener and said first location on the foot of the sail and an aft fastener tape extending from the head of the sail towards the foot of the sail for a distance not substantially less than the length of said forward tape of said second zip fastener to a point which, when both zip fasteners are open and the sail is spread out, is spaced from the aft tape of said first zip fastener by about the same distance as the spacing between said forward tape of said second zip fastener and said aft tape of said first zip fastener; reefing lines respectively extending down from said fastener slides to the region of the foot of the sail; line redirecting means at each side of the head of the sail, and unreefing lines respectively extending up from said slide fasteners to said respective redirecting means and thence down to the region of the foot of the sail.