Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With cutting – punching – piercing – severing – or tearing
Patent
1996-04-08
1997-09-30
Sells, James
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With cutting, punching, piercing, severing, or tearing
1565801, 1565835, 4251742, B32B 3116
Patent
active
056722362
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for making separator envelopes for electrical battery plates, comprising a device for folding sections of an ultrasonically weldable polymeric web over individual battery plates and a device for feeding filled separator envelopes to ultrasonic welding devices where the superposed open side margins of the separator envelope are welded together.
In known apparatus for wrapping battery plates, the separator envelopes folded over individual battery plates and open at their sides are intermittently guided to an ultrasonic welding device consisting of a lower horn and an upper anvil. The lateral margins to be connected are pressed between the horn and the anvil, and the ultrasonic welding connection is produced by an ultrasonic impulse of predetermined energy and duration. The significant disadvantage of the known apparatus resides in its intermittent process cycle which requires an elaborate control and results in a relatively low production rate.
U.S. Pat. No. 4,026,000 also discloses an apparatus of the kind referred to supra, which operates continuously and thus allows a higher production rate. In the known apparatus, the horn cooperates with an oppositely positioned rotary anvil the bias pressure of which may be set by the force of a spring. Feeding of the laterally open separator envelopes is accomplished by a pair of superposed rollers which push the separator envelopes to be welded through the welding device proper. This construction suffers from the disadvantage that because of their push feeding into the welding zone, the side margins of the separator envelopes to be welded are subjected to strong stresses, and they are often damaged.
From U.S. Pat. No. 4,866,914 it is known per se in the field of welding open polymeric bags, to pull the open end of the bag through an ultrasonic horn arrangement with two endless feed belts engaging the bag on its upper and lower surfaces. The horn arrangement operates intermittently. Nothing is disclosed by this publication about the special problems of two-sided welding of envelopes and, more particularly, about any structural solution to the problem of adjustments to accommodate envelopes of different widths.
The invention is directed to providing an apparatus of the kind referred to supra which while carefully handling the separator envelopes, permits high production rates of separator envelopes of different widths welded on two sides. The apparatus in accordance with the invention is characterized by the fact that the feeding device comprises two endless synchronously driven feed belts respectively positioned above and below a horizontal feed plane for the separator envelopes, as well as in symmetry relative to a longitudinal center plane of the apparatus, and together engaging, with their loops extending parallel to the feed plane, lateral portions of the separator envelopes and continuously pulling superposed lateral margins of the separator envelopes protruding beyond the feed belts, through the ultrasonic welding devices, the upper and lower feed belts being respectively guided by pulleys in side plates of a machine frame positioned at the intake and output ends, the side plates of both sides of the machine frame being mounted in the machine frame for adjustment, by an adjustment device, of the width of the welding margin symmetrically relative to the longitudinal center plane of the apparatus.
By means of the apparatus in accordance with the invention the two superposed separator envelopes to be welded together can be pulled into and out of the ultrasonic welding devices by the feed belts. Since the upper and lower feed belts move in synchronism, the traction force is always constant. This, at a high production rate and little wear on the apparatus, permits as careful a manipulation as possible of the material to be welded. In this connection, the feed belt suspension in accordance with the invention allows the apparatus to be adjusted precisely to the welded lateral margins width of the separator envelopes to be welded.
I
REFERENCES:
patent: 4026000 (1977-05-01), Anderson
patent: 4436585 (1984-03-01), Moodie et al.
patent: 4605454 (1986-08-01), Sayovitz et al.
patent: 4747895 (1988-05-01), Wallerstein et al.
patent: 4866914 (1989-09-01), Moribe
patent: 5591298 (1997-01-01), Goodman et al.
Hormann m Karl
Jungfer Ges.mbH.
Sells James
LandOfFree
Device for producing separator pockets for electrical accumulato does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for producing separator pockets for electrical accumulato, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for producing separator pockets for electrical accumulato will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2254366