US2072257A - Lock for cartons - Google Patents

Description

March 2, 1937. H. l.. GREVE LOCK FOR CARTONS Filed April 9, 195e Patented Mar. 2, 1937 PATENT orifice LOCK FOR CARTDNS Herman L. Greve, Hollis, N. Y., assignmto International Mailing Tube and Wrapper Compan Long Island City, Y., a corporation Application April 9,

Claims.

My invention relates 4to locks for cartons in which merchandise is shipped.

The object of my invention is to provide a lock for cartons by which the cover of a carton may be 5 permanently locked in engagement with the body portion, and is adapted to rest under a flap portion of the cover in such a position that access thereto is prevented.

Referring to the drawing which forms a part of the specifications;

Fig. 1 is a perspective View of a shipping carton, made of cardboard, in which the lock is shown attached thereto as it appears prior to closing the carton.

Fig. 2 is a view of the lock, shown on an enlarged scale and mounted on a side Wall within the carton.

Fig. 3 is a Vertical sectional view on line 3-3 of Fig. 2 showing the lock parts in engagement as illustrated in Fig. 2.

Fig. 4 is a similar View to that shown in Fig. 2 except that the lip portion formed on the side of the tongue of the lock, is shown in contact with the lower edge of the slot formed in the casing or body portion of the lock and with a latch portion carried on the tongue, in contact with the under side of an indent abutment formed in the casing.

Fig. 5,is a Vertical sectional view taken on line `.'i--5 of Fig. 2 showing the lock parts in engagement as illustrated in Fig. 4.

Fig. 6 is a plan sectional view on line 5-6 of Fig. 2.

Fig. 7 is a plan sectional View taken on line 'I-l of Fig. 4 showing the bell-shaped form of the guiding channel which guides the tongue to the relatively narrow slot formed at the lower end of the channel.

I0 indicates a carton formed with a front inner side body portion I I and an outer flap side portion I2, an inner cover portion I3, and an outer cover portion I4.

The female casing or body portion I5 of the lock is ailixed to the inner side of the portion II in the usual manner and position, by integral corner spur prongs.

The male portion I6 of the lock is also attached by prongs to the cover portion I4 in the usual manner by prongs.

The body portion comprises a plate I5 of thin resilient sheet metal formed to provide an oiset portion II in which is formed an inwardly extending indent IS the lower end of which serves as an abutment for a catch 2I carried on the tongue I6 of the latch.

1936, serial No. 13,403

In forming the offset portion il, a slot I9 of narrow width slightly greater than the thickness of the tongue I6 is formed, which extends longitudinally a distance corresponding to the width of the tongue plus the width of a laterally extending lip 20 which is also offset from the plane surface of the tongue at an angle as illustrated, and forms an abutting element which contacts the lower edge of the slot I9 in one position, as illustrated in Figure 4.

The tongue It is formed with an integral outwardly extending abutment ZI, offset from the plane surface of the tongue a distance corresponding to the thickness of the metal, and positioned so that its upper end abuts the under side of the indent I8 when in the position shown in Fig, 4, the lip 20 engaging the lower edge I9 as illustrated, and in such a manner as to act as a hinge at the point of contact.

In order that the lip portion 2li may pass thru the slot in the act of latching the lock, the metal of the body portion I5 and of the tongue, changes its form enough to permit the parts 2@ and ZI to snap thru the slot, and thereafter resume their normal form, and thereafter all attempts to unlock the parts are abortive.

It is this feature of the construction that is believed to be new and useful in the combination.

The normal position of the parts are shown in Figure 2, in which the upper end of the element 2l abuts the lower edge of the slot I9, the lip 20 serving as a guard to prevent the lock from opening in case the tongue slips to the position shown in Figure 4, in which position both the elements 2U and ZI are jointly holding the locked parts in abutting relation.

It will be obvious that the lip construction will alone serve to hold the parts of the lock in locked relation, but l.' prefer to use both the lip and the abutment 2l since it provides a stronger construction.

Having thus described my invention I claim as new:

1. A lock of the character described comprising a body portion of thin resilient material formed to provide a slot, and a latch formed with a single tongue of resilient material of less width than the length of the slot and having a single lip which extends laterally beyond the plane of the tongue and is adapted to flex in passing through the slot inthe locking operation.

2. A lock of the character described comprising a body portion of thin resilient material formed with a plane outer surface and having an offset portion formed to provide a slot, and a latch formed with a single tongue of less width than the length of the slot and having a single lip which extends laterally beyond the end of the slot and outwardly from the plane surface thereof.

3. A lock comprising a body portion of thin resilient material comprising an offset portion provided with a slot and having an indent which extends inwardly from the outer surface thereof to serve as an abutment, and a latch portion formed with a tongue of less width than the length of the slot and having a lip which extends beyond the end of said slot, and also having an offset portion the upper end of which is located on a plane above the lip and is adapted to abut the lower end of said indent when the lip is in abutment with the edge of said slot.

4. A lock comprising a body portion of thin resilient material having a' plane surface with an oiset portion provided with a slot, and having an indent which extends inwardly and serves as an abutment; and a latch portion formed with a tongue of less width than the length of the slot and having a lip which extends beyond the end of said slot and also extends outwardly from the plane surface of the body portion, and also having an abutting element adapted to abut said indent the upper end of which is located at a predetermined distance on a plane above said lip.

5. A lock of the character described comprising a body portion having a slot formed therein, and a single latch portion of resilient material which is adapted to flex in passing thru the slot in the locking operation, and of less width than the length of the slot and provided with a lip on one side only which extends laterally and outwardly beyond the end of the slot in swinging relation thereto.

HERMAN L. GREVE.

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