GB Patent 606937 - Improvements in and relating to an apparatus for producing metal band bindings

Description

PATENT SPECIFICATION 606

S S HIS Convention Date (Denmark): Dec. 9, 1940.

e Application Date (in United Kingdom): Jan. 22, 1946. No. 21 Complete Specification Accepted: Aug. 23, 1948.

(Under Section 6 (1) (a) of the Patents &c. (Emergency) Act, 1939 proviso to Section 91 (4) of the Patents and Designs Acts, 19 1942, became operative on Jan. 22, 1946).

Index at acceptance:-Class 146(ii), B4j.

COMPLETE SPECIFICATION

Improvements in and relating to an Apparatus for Producing Metal Band Bindings I, HENRY SORENSEN, a subject of the King of Denmark, of Nor, 14 Nyhavn, Copenhagen, Denmark, do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement:-

Apparatus for applying flat metal band ties to packages is known with claws co-operating like tong jaws, by the compression of which the overlapping band parts, which may be furnished with a metal binder or seal, are deformed by being pressed up against an abutment with recesses corresponding to the claws, while the claws with their pertaining actuating mechanism are carried by a holder, the claw holder, which may oscillate around an axis parallel to the direction of the band.

The present invention is designed to provide a convenient construction of such an apparatus. The actuating mechanism for the claws is formed by a pair of levers crossed scissor-wise which are jointed to the ends of the levers of the claws situated opposite to the claws, and are carried by the claw holder, the crossed levers carrying a hand lever at the free end of one of them and-means operable by the hand lever to force apart their free ends. Preferably such means comprise a cam surface and a roller or the like.

According to a further feature of the invention the said hand lever is so mounted on one of the free scissor lever ends remote from the axis around which the claw holder is rotatable that it may be used for pivoting the claw holder.

The invention thus enables the operator to combine into a continuous movement the action of the deforming parts and the pivoting of the claw holder; the scissor levers can first be opened and then the claw holder moved away from the band by movement of the hand lever in one direction and the claw holder moved into operative position and the deforming action carried X 7,? out by movement of the hand lever in the other direction.

The invention furthermore provides 50 means by which the claws are ensured against closing into the deforming position by the action of the hand lever until the claw holder has been turned down and the claws have thereby been brought into their 55 proper position in relation to the overlapping parts of the band. This may in accordance with the invention be effected by the spindle of the scissor levers being journalled in a pair of slots in the claw 60 holder and ensured against displacement in these slots by one of the ends of the spindle projecting out of its slot and being supported by a locking member which is not released until the claw holder has been 65 moved down into contact with the bed, the hand lever being meanwhile held secured in relation to the claw holder by the locking member.

A typical form of the invention is shown 70 by the accompanying drawings, in which:Fig. 1 is a perspective view, showing the apparatus mounted on top of a box and with a band inserted ready to be deformed. 75 Fig. 2 is a section through the claw holder and the bed plate at right angles to the band, Fig. 3 shows the apparatus viewed from the side from which the band is inserted, 80 and with its claw holder turned down, Fig. 4 shows the claw bolder and the adjacent parts viewed from the side where the shears for the cutting of the band are mounted, and 85 Fig. 5 shows the claw holder viewed from the other side which carries the locking member for preventing the claws from closing before the claw holder has been turned down. 90 On a base plate 1 are mounted bearing housings 2 for the tightening members, which in the embodiment shown consist of a hardened tightening roller 3 with a ",937 25146.

the 907 to 9606,937 knurled surface and a likewise hardened and knurled bed plate 4 which is laid into the base plate 1 immediately under the tightening roller 3. In a suitable way known per se care has been taken that the tightening roller may be raised from the bed plate when the band is to be inserted and pressed down against the latter during the tightening. For this purpose the spindle 5 of the tightening wheel may be mounted eccentrically in a bushing not shown, which is accommodated in the housings 2 and which may be turned by means of a hand lever 6. The spindle S proper has a pawl wheel not shown and may be turned by means of a hand lever 7 which carries a pawl, and a pawl is also provided by which the tightening roller is held secured after the tightening. The tightening means may be formed in niany other ways and do not form part of the present invention.

The base plate furthermore carries a band holder 9 with a tongue 10, which extends forwards across the base plate so that a narrow clearance 11 is formed, Figs. 3 and 4, between the tongue and the base plate, into which clearance one band part may be placed. Between the band holder 9 and the tightening roller 3 there is in the base plate a recess 8 which allows room for the claws when the claw holder is turned down.

Behind the recess 8 the claw holder 12 is mounted on a spindle 13 which is journalled in bearing brackets 14.

On the side facing the recess 8 the tongue has a shearing edge 15, and on the same side the band holder 9 carries a shearing jaw 16 formed as a double-armed lever journalled in the band holder with a pin 17 and with one of its arms in engagement with a rotatable arm 18 journalled on the claw holder, which arm 18 together with the shearing jaw 16 form a knee joint.

The other arm of the double-armed lever formed by the shears has a cutting edge 19, which on the claw holder being turned down around the spindle 13 co-operates with the cutting edge 15 for cutting a band part placed across the tongue 10.

The claw holder 12 consists of two side parts 20 and 21 which are held securely together at some distance from each other by means of bolts passing through a number of intermediate pieces 22, Fig. 2, every other one of which carry obliquely cut pieces projecting from under the lower edges of the side pieces and forming anvil teeth 23 when deformation of the band parts takes place. Into the clearances between the anvil teeth 23 the claws 24, which are carried by double-armed levers 25, project. These levers are rotatable around spindle 26 secured in the side parts and 21 and are connected at their opposite ends to two pairs of double-armed levers 27 and 2S which are connected scissor-wise by means of a spindle 29 the ends of which may slide in slots 30 in the 70 side parts 20 and 21. The levers 27 carry between them it their free ends a roller 31 and the levers 28 in a similar way a hand lever 32 formed integrally with an operative cam portion 33. The free ends of the 75 scissor levers 27 and 28 are connected by a pair of helical springs 34.

The side part 21 carries, as shown in Fig. 5, a lever 36 rotatable around a pin 35, which lever forms a locking member for the 80 scissor spindle 29 and for this purpose has an abutment 37 which is urged by a spring 38 to engage a, projecting end. of the spindle 29 as shown in full lines. The other end of the lever 36 has a finger 39 which in the 85 full line position projects below the lower edge of the side part 21. When the claw holder is brought down into operative position the finger 39 comes in contact with the base plate 1 and is pressed upwards to 90 the position shown in dotted lines and the abutment 37 is moved to release the spindle 29.

In Fig. 1 the two parts 40 and 41 of a band placed aroud a box are shown inserted 95 into the apparatus. At the point where the deformation is to be performed there is placed over the overlapping band parts a metal binder or seal 42.

The apparatus functions in the following 100 way.

The machine is mounted on the object to be bound and the band is placed in the machine as shown, the lower part being placed in the clearance 11 and in under the 105 tightening roller 3 so as to touch the supporting plate 4. The other part 40 is likewise placed in under the tightening roller 3 on top of the part 41, while at the other side of the recess 8 it is Dlaced across 110 the tongue 10 but under the shearing jaw 16. Next the tightening roller 3 is pressed downwards by turning the hand lever 6, and the upper band part 40 is tightened (sliding over the band part 41) to the 115 degree desired by means of the hand lever 7.

A binder or seal 42 is placed over the overlapping band parts over the recess 8, and the hand lever 32 is drawn forwards.

At the beginning of this motion there only 120 occurs a turning-down of the claw holder 12 so that the claws 24 as shown in Fi. 2 get in under the band parts. Until this position is reached the hand lever is prevented from moving perceptibly in 125 relation to the scissor levers 27 and 28, the scissor spindle 29 being secured by the abutment 37 of the lever 36. When the position is reached at which the finger 39 has been moved by its contact with the 130 606,937 base plate 1 to withdraw the looking member, further movement of the hand lever 32 operates the cam part 33 against the roller 34, so that the ends of the scissor levers are moved apart and thereby turn the levers 25, which carry the claws 24, around the claw spindles 26, so that the claws are pressed towards each other and upwards between the anvil teeth 23, and the seal 42 is closed around the band parts and together with the edges of the latter deformed so that a mutual displacement is made impossible.

During the turning-down of the claw holder the shearing jaw 16 has cut off the free end of the band part 40.

The apparatus may as to details be formed in many other ways than the one shown and described without deviating from the invention. As already mentioned other tightening means may be employed.

The claws and the anvil parts may also be otherwise suitably shaped, e.g. so that a joint is formed of the kind in which the parts of the flat band where deformation takes place are shaped into interlocked tubes, without any metal binder being used. The operative interaction of members which force apart the ends of the scissor levers may also be effected in other ways than that shown. By way of example the ends of the scissors lever 27 may. be connected by means of a connecting rod from the short arm of the hand lever 32 to the end of the levers 27, or the hand lever may be single-armed and mounted on the scissor levers 27 and with a connecting rod connected to the ends of the scissor levers 28. The form of the scissor mechanism may also be varied. In connection with the band holder 9 there may expediently be mounted a hook-like retaining dog which holds the free end of the band part 40 down against the upper side of the tongue 10 and at a suitable distance from the front of the apparatus, but as this is of no importance as regards the principle of the invention it is not shown on the drawing.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be per-