Photo album page

• US 5,242,522 A
• Filed: 11/23/1992
• Issued: 09/07/1993
• Est. Priority Date: 11/23/1992
• Status: Expired due to Fees

• Current Assignee: Enbee Plastics Incorporated
• Original Assignee: Enbee Plastics Incorporated
• Inventors: Moir, Matthew
• Primary Examiner(s): Weston, Caleb
• Application Number:
  US07/980,243
• Time in Patent Office: 288 Days
• Field of Search: 156/243, 156/244.11, 156/244.12, 156/244.18, 156/244.19, 156/290, 156/291, 156/325, 156/327, 156/250, 40/159
• US Class Current: 156/243
• CPC Class Codes: B29C 2793/00 Shaping techniques involving a cutting or machining operation
• CPC Class Codes: B29C 65/40 Applying molten plastics, e.g. hot melt using welding bar combined with hot gases B29C65/12; by moulding B29C65/70
• CPC Class Codes: B29C 66/004 Preventing sticking together, e.g. of some areas of the parts to be joined
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/43 Joining a relatively small portion of the surface of said articles B29C66/45 takes precedence
• CPC Class Codes: B29C 66/4722 Fixing strips to surfaces other than edge faces fixing strips to edge faces B29C63/0026
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/73776 the to-be-joined areas of both parts to be joined being crystalline
• CPC Class Codes: B29C 66/73921 characterised by the materials of both parts being thermoplastics
• CPC Class Codes: B29C 66/83413 cooperating rollers, cylinders or drums
• CPC Class Codes: B29K 2023/12 PP, i.e. polypropylene
• CPC Class Codes: B29L 2031/705 Books, albums
• CPC Class Codes: Y10T 156/1052 with cutting, punching, tearing or severing

Abstract

A method for producing a photo album page composed of superposed panels of transparent polypropylene film joined together by parallel lines of adhesive to define channels, each of which is divided by a paper strip into front and rear compartments to accommodate photos. To make photo album pages of this type, two webs of polypropylene film are concurrently advanced into combining rolls. Applied to the inner surface of one of the polypropylene webs are parallel lines of hot-melt adhesive whose chemistry is such that it has an affinity for polypropylene. When the webs are adhered together in the combining rolls, the lines create a plurality of channels. Also concurrently fed into the combining rolls in the spaces between the lines are a like plurality of paper tapes, whereby emerging from the rolls is a composite web which is then slit into individual album pages.

Claims

1. A method to produce photo album pages comprising the steps of:

(a) concurrently advancing two webs of polypropylene film material into combining rolls;

(b) applying to an inner surface of one of said webs parallel lines of a hot melt adhesive in the hot molten state having a chemical affinity for polypropylene, the webs being advanced at a rate whereby the adhesive is molten when the webs enter the rolls and then rapidly cools and hardens to produce a permanent bond, the bond lines then defining a plurality of like channels; and

(c) transversely slitting the combined webs emerging from the rolls into individual album pages.

2. A method as set forth in claim 1, in which the adhesive is an amorphous polyolefin, free of acidity.

3. A method as set forth in claim 1, wherein said polypropylene is biaxially oriented.

4. A method as set forth in claim 1, wherein said webs are advanced at a rate of at least 100 feet per minute.

5. A method as set forth in claim 1, wherein said webs have a thickness not in excess of 2 mils.

6. A method as set forth in claim 1, further including the step of concurrently advancing into the combining rolls a like plurality of paper tapes so that they lie between the lines of adhesive and in the album page form paper strips in each channel which divide the channel into front and rear compartments to accommodate photos.

7. A method as set forth in claim 1, wherein there are at least three channels.