US1521970A - Embossing apparatus - Google Patents

Description

G. SCHAULY E T. AL

EMBOSSING APPARATUS 7 Filed g 11 1923 2 Sheets-Sheet 1 Jan. 6. 5- 1,521,970

s. SCHAULY ET AL EMBOSSING APPARATUS Filed Aug. 11 1923 2 Sheets-Sheet 2 Mrenfohs:

Patented Jan. 6, 1925.

GEORGES SCEAULY nn Ln'on GERNIGON, or mantras, rnancn, nssrenoas To r'xon ennmeoiv, or NANTES, nome-rnrnarnnnn, rnancn.

EIv'IBOSSINGr APPARATUS.

Application filed. August 11, 1923.

To all whom it may concern:

Be it known that we, GEORGES SOHAULY and LEON GERNIeoN, citizens of the French Republic, residing at Nantes, Loire-Inferieure, France, have invented certain Improvements in Embossing Apparatus, of which the following is a specification.

Imitations of embossed printing are produced by spraying an easily fusible powder over a sheet printed with ordinary ink, the sheet being then passed through an oven in which it is heated so as to cause the powder to fuse and to amalgamate with the ink to form a print having the appearance of being embossed. The ovens usually employed for this purpose contain a heating element covcred by a baflle plate over which the sheets are led by means of an endless travelling apron. Sometimes two superposed sets of heating elements are employed between which the conveying apron is passed.

The present invention relates to an oven of this kind and its object is to produce a heating zone through which even the most sensitive sheets can pass without buckling or curling. With this object in view we provide two heating elements as well as heat distributors composed of cross-ribbed metal plates arranged with downwardly directed ribs so as to prevent the hot air from circulating under the plates and rendering the heating irregular, the conveying apron being arranged so as to pass the sheets between the distributors and the upper heating element.

By this arrangement both sides of the sheets will be subjected to a perfectly uni form and equally intense heat so that the sheets can pass through the oven without buckling or curling and so that the embossing effect will be uniform over the entire sheet.

Fig. 1 is a general View of this apparatus;

Fig. 2 is a longitudinal section of the same;

Fig. 3 is a plan view;

Fig. 4 is a cross section thereof;

Fig. 5 is a longitudinal section of a modified arrangement, and

Fig. 6 an inverted plan of the heat-distributing plate.

This apparatus is composed of a lower oven 1 and of an upper oven 2 made of metal Serial No. 656,909.

bodies and preferably provided as shown in Fig. 5, with an outside coating 19 of asbestos. Within the lower oven are arranged two rollers 3 over which runs an asbestos or all metal conveyor 4 serving to convey sheets 5 through the oven.

Between the two rollers is arranged a sheet iron heat distributor 6 having downwardly directed cross-ribs 7.

The conveyor runs over the smooth top of the distributor.

Underneath the distributor is arranged a heating element 8 while a second heating element 9 is located in the upper oven.

The spindles of the two rollers 8 are provided with sprocket pinions 10 connected outside the apparatus by a chain 11 which may advantageously. run on two other pinions 12 and 13 serving to support it.

The rollers may be driven by hand, by a sprocket wheel 14 or by any motor.

On one of the ends of the apparatus is articulated a plate or tray 15 adapted to be sloped according to requirements by means of a rod 16 provided with a slot through which passes a set screw. A second tray 17 is articulated on the other end of the apparatus.

On the two rollers being rotated either by hand or by a motor the sheets are taken by the conveyor and conveyed through the oven to be discharged on tray 17.

The ribs 7 prevent the hot air from circulating under the plate 6 which will therefore be maintained in a uniformly heated condition. The sheets 5 will also be uniformly heated on both sides and will pass through the oven without buckling o-r curling.

This apparatus may advantageously be set on stands made of refractory material.

A second ribbed plate 18 may be arranged above the plate 6 between the stretches of the apron 8, as shown in Fig. 5.

e claim- 1. An oven for use in the production of embossed printing imitation, comprising a heating chamber, two superposed heating elements arranged in said chamber, a heat distributor composed of cross-ribbed metal plates arranged between said heating elements with downwardly directed ribs, and

an endless travelling apron arranged so as to convey the printing sheets between the upper heating element and the heat distributor.

2. An oven for .use in the production of embossed printing imitations, comprising a heating chamber, two superposed heatingelements arranged in said chamber, a heat distributor composed of two superposed metal plates arranged between said heating W elements, and an endless travelling apron arranged so as to convey the printing sheets between the upper heating element and the heat distributor.

GEORGES SCHAULY.

LEON GERNIGON.

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