US3715820A

US3715820A - Ironing press

Info

Publication number: US3715820A
Application number: US00086936A
Authority: US
Inventors: W Hentschel
Original assignee: DORNIER AG
Current assignee: DORNIER AG; DORNIER AG DT
Priority date: 1968-11-02
Filing date: 1970-11-04
Publication date: 1973-02-13
Anticipated expiration: 1990-02-13
Also published as: DE1806776A1; FR2033197A1; GB1238400A

Abstract

This invention relates to an ironing press comprising buck means having a convex curvature and head means having a concave curvature, and a pressure mechanism for pressing said means together, one of said means being bendable and of a flatter curvature than the other, and the other of said means being rigid.

Description

[4 1 Feb. 13, 1973 [56] References Cited UNITED STATES PATENTS [54] IRONING PRESS [75] Inventor: Wolfgang l-lentschel, 8000 Munich n s u 3 Or. FB 7 72 99 ll 61 1 01 0 37 84 31 G A y n a T ll G n m 9 4 D e n g .1 S S A 1 3 7 .l

Ger- 1,538,077 5/ 1925 Zuruk-Zurinsky..

Friedrichshafen/Bodensee,

many

Schlemon.

[22] Filed: Nov. 4, 1970 [21] Appl. No.: 86,936

Related Application Data Primary Examiner-Jordan Franklin Continuation of Ser. No. 867,318, Oct. 17, 1969, Assistant Examiner-G. V. Larkin abandoned. Attorney-James E. Bryan ABSTRACT [30] Foreign Application Priority Data Nov. 2, 1968 Germany.....................P 18 06 776.0 This invention relates to an ironing press comprising buck means having a convex curvature and head 100/295 means having a concave curvature, and a pressure mechanism for pressing said means together, one of said means being bendable and of a flatter curvature Field of Search.

2. 7 223/5 0 than the other, and the other of said means being rigid.

4 Claims, 2 Drawing Figures PATENTEDFEB 13 I975 INVENTQR WOLFGANG HENTSCHEL F TORNEYS IRONING PRESS This application is a continuation of Ser. No. 867,3 l8, tiled Oct. 17,1969, and now abandoned.

This invention relates to an ironing press which comprises a buck, a head having a concave curvature, and a pressure mechanism which presses both pressure parts against each other. 1

In ironing apparatuses of the present type which have been heretofore known, the head, which is generally pivotally mounted, has a concave curvature while the coordinated buck has a curvature which matches that of the head. An adjustment of any possibly existing inaccuracies at the curved plates or dissimilar levels of the material to be ironed, which is positioned between the pressure parts, is intended to be compensated for by means of elastic linings or the like. This is possible, however, only to an insufficient degree since particularly the elastic linings lose their elasticity in the course of time and since, in addition, these linings are not adapted to bring about an adjustment of the two pressure parts on the one hand, and between these parts with respect to the material to be ironed, on the other hand.

The present invention provides an ironing apparatus in which the two pressure parts and ironing plates which enclose the material to be ironed between them are adapted to adjust to each other with respect to their curvatures and in which uniform or at least approximately uniform bearing or contact pressure forces are effected at each point on the ironing surfaces. The present invention also avoids an unintentional formation of wrinkles during the ironing operation without the need for exercising excessive care when introducing the material to be ironed into the press.

In the present invention, the buck and the ironing surface thereof has a flatter curvature than the head and the buck, and the ironing surface of the latter is adapted to be elastically deformed, i.e., it is bendable.

A further feature of the present invention resides in that at least one of the two pressure parts is constructed as a carrier having the same rigidity or strength and the action or application of the bearing or contact pressure force being produced by the pressure mechanism occurs in the plane of symmetry of the carrier.

An ironing press constructed with the features indicated hereinabove affords the essential advantages of a faultless adaptation or adjustment of the buck to the head, of a uniform distribution of pressure over the entire ironing surface, and of an adaptation or adjustment of the pressure parts to the material to be ironed. Moreover, as a result of the shape of the curvature of the buck and the head adjusting to each other under load, a relative gliding motion extending in both directions of curvature is produced between the ironing surfaces and, hence, the effect of stretching of the material to be ironed is achieved. By stretching the material to be ironed, flawless ironing results can be obtained and any undesirable formation of wrinkles which may be present when the material to be ironed is introduced can be effectively compensated for.

One embodiment of the present invention is illustrated in the accompanying drawing wherein FIG. 1 is a view in elevation, partially in cross-section, of an ironing press according to the present invention, and

FIG. 2 is a bottom view of the buck.

Reference numeral 1 identifies the upper part and reference numeral 2 represents the lower part of the ironing press. The lower part 2 receives the buck 3 and the upper part 1 receives the head 4. The buck 3 and the head 4 are provided with ironing plates 3' and 4, respectively, which enclose between each other the material to be ironed. The upper part 1 consists of a clamping bracket 5 which carries the head 4 and this clamping bracket 5 is pivotally connected by means of a bearing 6 to the lower part 2. The pivotal upper part 1 comprising the head 4 may be locked in the closed position thereof by means of a locking device, not shown, the latter being actuated by means of switching or contact members, also not shown. Accommodated within the lower part 2, which is provided with a boxlike shape, is a pressure mechanism 1 l which acts upon the buck 3, which latter is vertically and movably guided at the lower part 2 while the upper part 1 houses a heating device, not shown.

In the illustrated embodiment, the pressure mechanism 11 for the buck 3 consists of a drive motor 13, a reduction gear 14, and a pressure spindle 15. Further, piston portions, not shown, which may be threaded upon the spindle 15 are guided within the cylinder housing 16 and act, by means of a hydraulic medium present within the cylinder housing 16, upon a pressure piston rod 17. Inserted between the pressure piston rod 17 and the buck 3 is a pressure-limiting device 21 which consists of two parts 21 and 21" being relatively displaceable with respect to each other against the action of a set of cup springs, one of these parts being supported against the buck 3 and the other being supported against the pressure piston rod 17. For a preset amount of the relative path of both parts, a switching lever 26 is actuated due to the relative movement and acts, with the switching surface thereof, upon a disconnecting member or switch 27 by means of which latter the drive motor 13 is caused to stop. When the buck 3 travels back to its starting position following a polarity reversal of the drive motor 13, a final disconnecting member or switch 28 is actuated by means of the lever 26. The pressure-limiting device 21 is connected to the buck 3 by means of a universal joint 30 and 31. Also present are

compression springs

32 and 33, respectively, which maintain the buck, in the unloaded condition thereof, in a position approximately parallel to the head 4.

The buck 3 consists of the ironing plate 3' which is reinforced with two longitudinal ribs 37 and transverse ribs 36, the ribs preferably extending outwardly in a tapered configuration. In the illustrated embodiment, the ironing plate 3' of the buck 3 is constructed so as to be bendable for example, theplate 3' could be constructed of any type of well known resilient material. Instead of the ironing plate 3', however, the ironing plate 4' of the head 4 also may be constructed in this manner. The ribs then are so dimensioned that the ironing plate 3' is to be assumed as the carrier having the same bending strength in all of its cross-sections so that consequently the same bearing or contact pressure will be produced when the ironing plate 3' of the buck 3 comes to rest against the ironing plate 4' of the head 4. Furthermore, the ironing plate 3 has an outwardly curved convex configuration over the entire surface thereof. The ironing plate 4' of the head 4 has a concave curvature, as compared to the buck 3, and the curvature of the buck 3 is flatter than that of the ironing plate 4' of the head 4. The head 4 is further constructed so as to be rigid, i.e., not bendable, by means of a box-shaped frame 35. The application of force of the pressure mechanism 11 takes place in this case in the center of the buck 3 through which also extends the plane of symmetry EE of the buck. Instead of a single transmission of force, several pressure bearing points extending in the plane of symmetry E-E also may be provided.

The operation of the apparatus is as follows: in the neutral position of the buck 3, as illustrated in FIG. 1, the material to be ironed is placed upon the buck 3 and the upper part 1 with the head 4 brought into the closing position thereof. By actuating a switch, the drive motor 13 is started and the compressive force or pressure is transmitted to the pressure piston rod 17 by means of the hydraulic medium, transmission gear 14, and the spindle 15, as well as the pistons within the cylinder housing 16. The piston rod 17 moves the buck 3 in the direction toward the head 4. Due to the different curvatures of the buck 3 and the head 4, the outer ends of the head will first contact the surface of the buck. In the course of the continuing contact pressure movement of the buck 3, the curvature of the latter will progressively adjust to the curvature of the head 4. At the time of this adjusting movement, a gliding motion occurs between the outer ends of ironing plate 4' of the head 4 and the surface of ironing plate 3' of the buck 3, which gliding motion is effective in the direction of the curvature of both parts. This gliding movement is also transmitted to the material to be ironed which has been introduced between the pressure parts.

This gliding motion between the head 4 and the buck 3 has the effect that the material to be ironed is stretched out smoothly. When the preset contact pressure has been attained, the pressure-limiting device 21 turns off the drive motor 13 by means of the lever 26 and the switch 27. By means of a polarity reversal of the drive motor 13, upon completion of the ironing operation, a return travel of the buck 3 into the starting position thereof is effected. When the starting position has been attained, the drive motor 13 is turned off by means of the lever 26 and the disconnecting member or switch 28.

It will be obvious to those skilled in the art that many modifications may be made within the scope of the present invention without departing from the spirit thereof, and the invention includes all such modifications.

What is claimed is:

1. An ironing press comprising buck means having a convex curvature and head means having a concave curvature throughout their coacting surfaces, one of said means having its coacting surface of a flatter curvature than the other, and a pressure mechanism for pressing said means together, one of said means being of resilient material, and the other of said means being rigid, to produce a relative gliding motion between the ironing surfaces of the buck and head means to stretch the material being ironed.

2. An ironing press according to claim 1 in which the buck means is of resilient material and is of a flatter curvature than the head means.

3. An ironing press according to claim 1 in which at least one of said means is constructed as a carrier having uniform rigidity and including means whereby the force produced by the pressure mechanism is effective in a longitudinal plane which vertically bisects the carrier.

4. An ironing press according to claim 1 including a universal joint through which the force generated by the pressure mechanism is transmitted.