The present invention relates to sewing equipment, and in particular, to an automated assembly or system for inserting a label or mattress “law tag” during formation and sewing of a mattress border prior to closing the border to form a finished work piece.
In the manufacture of bedding such as mattresses, foundations or box springs, etc., sewing operations for forming and attaching borders, panels and other components traditionally have been extremely labor intensive, manual operations that further generally have required a significant amount of skill on the part of the sewing operator to cut, sew, and finish the bedding components. The more labor intensive and the greater the amount of skill required of the operator to form a component, however, the greater the cost and the more limited or slower the production of such components. As a result, there have been efforts to develop more automated sewing equipment that will enable less skilled operators to operate the equipment and form bedding components, and/or which can be operated with less operator control or intervention required, such that one operator can run multiple sewing stations at one time in order to increase production while decreasing the manpower and skill level of the operator required to form the desired bedding components.
In addition, governmental regulations require that labels or “law tags” be attached to mattresses and foundations or box springs. Such labels or law tags generally provide regulatory and warning information, as well as identify the particular manufacturer of the mattress or foundation. As a result, such law tags or labels are required by law to be sewn into every mattress or foundation during their manufacture. Typically, the insertion and sewing of a law tag or label into a mattress or foundation component has been a substantially manual operation, generally requiring careful placement and sewing of the law tag with a portion of the law tag extending or projecting inside the mattress or foundation. If the tag is removed from the mattress, etc. by the end user, a portion of the tag will remain inside the bed to provide necessary identification information relating to the mattress or foundation to which it is attached.
In one aspect of the invention, a method is provided for forming a mattress border having a label attached. A length of border material is fed along a path of travel and a measured portion of the material is cut to form the border. Adjacent edges of the border are clamped and moved into a predetermined position in front of a label inserter assembly. The label is automatically lifted from a hopper and inserted between the cut edges of the border. The border is then moved to a closing station and the cut edges are sewn with the label inserted therein to form a completed border.
In another aspect of the invention, an automatic border sewing system is provided for sewing borders for mattresses and foundations with a label inserted therein. A fed and cut assembly receives, measures and cuts a supply of border material to from a border having a desired length. A closer station is located downstream from the feed and cut assembly and has a closer head for sewing cut edges of the border together to from a completed border. A clamp assembly engages the border adjacent its cut ends as the border is cut and transfers the border to the closer station. An automatic inserter assembly includes a hopper for supplying a label, and a label clamp and transfer subassembly having a clamp mechanism that engages the label. An actuator moves the label clamp transfer subassembly forward into a position for inserting the label between the cut edges of the border. A control system monitors and controls operation of the feed and cut assembly, label inserter assembly and closer station to form a completed border with a label sewn therein.
Various objects, features and advantages of the present invention will become apparent to those skilled in the art upon consideration of the following description when taken in conjunction with the accompanying drawings.
The invention is better understood by reading the following detailed description of the invention in conjunction with the accompanying drawings.
The following description of the invention is provided as an enabling teaching of the invention in its best, currently known embodiment. Those skilled in the relevant art will recognize that many changes can be made to the embodiments described, while still obtaining the beneficial results of the present invention. It will also be apparent that some of the desired benefits of the present invention can be obtained by selecting some of the features of the present invention without utilizing other features. Accordingly, those who work in the art will recognize that many modifications and adaptations to the present invention are possible and may even be desirable in certain circumstances and are a part of the present invention. Thus, the following description is provided as illustrative of the principles of the present invention and not in limitation thereof, since the scope of the present invention is defined by the claims.
The present invention generally relates to a system or assembly for inserting a label, such as a law tag, between the ends of a border for a mattress or foundation prior to the closing of the ends of the border so that the label/tag is attached upon the closing of the border with a portion of the tag projecting inwardly. When the border is applied to a frame for a foundation or mattress, a portion of the tag will remain inside the completed mattress or foundation. The label/tag inserter system or assemblies of the present invention generally will be mounted on a border sewing station or system, typically an automatic border sewing system such as an Atlanta Attachment model 3200C, model 3200M, model 3200P, model 3206, model 3261, or model 3300 “Automatic Border Sewing Station.” Such an automatic border sewing station typically will be controlled by a programmable control system having an operator interface or input device through which the operator can program different features or styles of mattress borders to be formed and/or different speeds of operation, and which control system will monitor and control the function and operation of the border sewing station with the label/tag inserter system of the present invention.
The automatic border sewing system further generally will include a series of operator assemblies or components including a pre-feed assembly 16 for feeding a length of border material 11 from a supply roll 25, a feed and cut assembly 17, and a closer station 18. For example, such a system is disclosed and claimed in U.S. Pat. No. 6,802,271, the disclosure of which is incorporated herein by reference in its entirety.
As generally illustrated in
After a border 11 of a desired length (i.e., sized to fit a king, queen, etc. sized mattress or foundation) has been fed and cut with its corners mitered and sewn as needed or desired, a secondary clamp mechanism 36 generally is moved into engagement with the border. The secondary clamp mechanism generally includes a first or upper clamp jaw 38 and a second or lower clamp jaw 39. The upper clamp jaw generally is moveable from a separated, non-engaging position into a lowered, clamping position for clamping and holding the border material against the lower clamp jaw 39. As indicated in
The lateral movement of the secondary clamp mechanism 36 is controlled by a motor 148 (
In addition, as shown in
The secondary clamp mechanism 36 is moved rearwardly until it reaches a calculated insertion position in front of the inserter assembly. The control system (not shown) for the automatic border sewing system generally will be programmed to make a determination as to the size of the border 11 based upon the information received from the sensor 40 attached to the secondary clamp mechanism 36 as to the position of the leading and trailing edges or sides of the border. The control system accordingly will stop the movement of the secondary clamp mechanism 36 in a preprogrammed position in front of the inserter assembly 50.
As further illustrated in
In addition, as shown in
The inserter assembly 50 is generally shown in
As shown in
The inserter assembly further includes a label transfer clamp subassembly 90, comprising an inserter clamp having a pair of clamp arms 92 (
Additionally, as shown in
After the label has been inserted, a pair of label hold cylinders 180 as shown in
For example, the drive cylinder for the label transfer clamp subassembly can be set at approximately 20–25 psi, while the cylinder 82 of the label pre-feeder 80 can be set at approximately 10 psi, and the label hold cylinders 180 at approximately 10–15 psi. It will also be understood by those skilled in the art that various greater or lesser pressures also can be used, with the pressures typically being set at a safe level to avoid damage to the label inserter assembly 50 when a fault condition exists. Thus, if the secondary clamp mechanism 36 transporting the border fails to fully transport the border to its insertion position centered in front of the label inserter assembly 50, such that the forward movement of the clamp arms 92 of the label transfer clamp subassembly 90 would engage the upper 37 or lower clamp arm 39 of the secondary clamp mechanism 36, the pressure for the drive cylinder for the label transfer clamp subassembly 90 generally is set low enough such that any further forward movement of the label transfer clamp subassembly 90 will be stopped and the pressure urging the label transfer clamp subassembly 90 forwardly against the clamp arm will be insufficient to bend or otherwise damage the label transfer clamp subassembly 90 or the clamp arm of the secondary clamp.
Once the label has been inserted and the label transfer clamp subassembly 90 has been returned to its start position, the clamp and hold cylinders 180 are disengaged so as to release the border material, and the secondary clamp assembly 36 then proceeds to the closing station 18. As the border enters the closing station 18, sensors detect the leading and trailing edges of the border, after which the border can be engaged by a puller that feeds the cut edges of the border through the closer station 18 for sewing and closing the edges to form a completed border having a label or law tag sewn therein.
In an alternate embodiment of the invention,
An advantage of the rotary label feeder mechanism is that the index wheel does not move with the label. There is an angular relationship between the index wheel 212 and the label support plate 204 inside label hopper 200. The label support plate 204 is fixed in position on one end. Near the other end of the label support plate 204, a torsion or other suitable spring 202 attaches the support plate 204 to the bottom inside surface of hopper 202. The support plate 204 loaded with labels 210 is close to horizontal when the hopper 200 is full. As the labels 210 are fed from the hopper 200, the angle of the support plate 204 changes. The contact point between the index wheel 212 and uppermost label does not change as labels 210 are fed. The index wheel 212 propels the label forward, with subsequent labels moving at a slightly changing angle as each label is fed into the border material.
As the index wheel 212 rotates (e.g., 80–90 degrees), depending on the circumference of the wheel, the top label is fed a certain distance. For example, to prefeed a label one inch using a wheel that has a one inch diameter would require that the wheel rotate 120 degrees. Adjustable, automatic indexed rotary cylinders 216 suitable for use in this embodiment are readily available in the market. The index cylinder 216 can be a pneumatic or electrical device (solenoid actuated), or could be motor or belt driven.
Pivot cylinder 224 is attached on one end to the framework of the border sewing machine assembly. It is attached to the pivot arm 220 on the other end at a distance of about one third to one half the distance from the fixed end of the pivot arm so that a short cylinder stroke can be used. Pivot arm 220 is attached on its fixed end to the framework of the border sewing machine assembly. The pivot cylinder 224 is connected to the pivot arm 220 at an angle with respect to the vertical. When the index wheel 212 and index cylinder 216 are in the up (disengaged) position, the pivot cylinder 224 is nearly perpendicular to the pivot arm 220. This enables smooth mechanical movement of the index wheel and cylinder. Other orientations of the pivot cylinder with respect to the pivot arm are also possible.
It will be understood by those skilled in the art that while the invention has been discussed above with reference to preferred embodiments, various changes, modifications and additions can be made thereto without departing from the spirit and scope of the invention as set forth in the following claims.
The present patent application is a formalization of a previously filed, co-pending provisional patent application entitled “Label/Tag Inserter System,” filed Sep. 27, 2004, as U.S. Patent Application Ser. No. 60/613,282 by the inventors named in this patent application. This patent application claims the benefit of the filing date of the cited provisional patent application according to the statutes and rules governing provisional patent applications, particularly 35 U.S.C. § 119(e)(1) and 37 CFR §§ 1.78(a)(4) and (a)(5). The specification and drawings of the provisional patent application are specifically incorporated herein by reference.
Number | Name | Date | Kind |
---|---|---|---|
3458381 | Metcalfe | Jul 1969 | A |
4766826 | Block | Aug 1988 | A |
4986524 | Meintzer et al. | Jan 1991 | A |
5431531 | Nozawa | Jul 1995 | A |
5479757 | Ogawa | Jan 1996 | A |
5520129 | Porter et al. | May 1996 | A |
5809919 | Mitchell et al. | Sep 1998 | A |
5865137 | Frye | Feb 1999 | A |
6397768 | Dasher et al. | Jun 2002 | B1 |
6662737 | Marcangelo et al. | Dec 2003 | B1 |
6802271 | Oxley et al. | Oct 2004 | B1 |
Number | Date | Country | |
---|---|---|---|
60613282 | Sep 2004 | US |