什(shen)么是裹背(bei)條(tiao)，裹背(bei)條(tiao)是通(tong)過(guo)皮殼機(ji)等機(ji)械(xie)用于精裝書(shu)(shu)本(ben)的(de)書(shu)(shu)脊部分，使(shi)書(shu)(shu)貼連接得(de)更加牢固。書(shu)(shu)脊制作(zuo)弧長的(de)計算，本(ben)器規(gui)格依書(shu)(shu)芯(xin)幅面大小進行(xing)調定，以能將書(shu)(shu)芯(xin)平穩地送進夾(jia)書(shu)(shu)裝置(zhi)(zhi)內為標準。入本(ben)后(hou)的(de)書(shu)(shu)冊不斜歪，四角垂直地頂齊在夾(jia)書(shu)(shu)裝置(zhi)(zhi)的(de)靠板(ban)、側規(gui)內。裁切尺寸正確一致，其質(zhi)量要求與(yu)規(gui)格誤差與(yu)一般(ban)切書(shu)(shu)相同。

夾書(shu)(shu)簽絲(si)帶(dai)(dai)裝置(zhi)安放(fang)在(zai)切書(shu)(shu)機與扒圓起(qi)脊機之間(jian)。即將(jiang)切完的(de)書(shu)(shu)芯，用(yong)分(fen)本器從(cong)中(zhong)間(jian)分(fen)開，再(zai)由輸放(fang)絲(si)帶(dai)(dai)器將(jiang)絲(si)帶(dai)(dai)夾入中(zhong)心紙書(shu)(shu)芯的(de)中(zhong)間(jian)靠(kao)訂縫一邊。絲(si)帶(dai)(dai)夾在(zai)書(shu)(shu)芯內兩端各(ge)留出粘邊和使用(yong)的(de)余地(di)，再(zai)經切刀(dao)（剪刀(dao)式(shi)）將(jiang)其剪斷。

剪斷后(hou)的(de)(de)(de)絲帶(dai)(dai)，裹背(bei)條(tiao)芯(xin)(xin)部分(fen)(fen)被下面膠輥(gun)著膠、壓實完(wan)成夾書(shu)(shu)(shu)簽絲帶(dai)(dai)過(guo)程。書(shu)(shu)(shu)簽絲帶(dai)(dai)的(de)(de)(de)長度(du)與(yu)一般手工加工長度(du)基本(ben)相同(tong)，可依書(shu)(shu)(shu)冊幅面長度(du)調定(ding)。扒(ba)圓起(qi)(qi)脊(ji)(ji)操(cao)作及要求(qiu)。書(shu)(shu)(shu)芯(xin)(xin)經裁切(qie)、夾粘絲帶(dai)(dai)（或(huo)不夾粘絲帶(dai)(dai)）后(hou)，繼續傳送(song)（或(huo)翻轉變位）并做(zuo)90°翻轉，使平(ping)(ping)放書(shu)(shu)(shu)芯(xin)(xin)變為后(hou)背(bei)朝上(shang)（或(huo)朝下）而進入扒(ba)圓起(qi)(qi)脊(ji)(ji)機。扒(ba)圓起(qi)(qi)脊(ji)(ji)機的(de)(de)(de)加工，其操(cao)作分(fen)(fen)為兩步(bu)，但機器(qi)的(de)(de)(de)結構是連在(zai)(zai)一起(qi)(qi)的(de)(de)(de)，均是先扒(ba)圓后(hou)起(qi)(qi)脊(ji)(ji)。扒(ba)圓。扒(ba)圓起(qi)(qi)脊(ji)(ji)機在(zai)(zai)扒(ba)圓時，由一組（或(huo)一對）圓輥(gun)，將書(shu)(shu)(shu)芯(xin)(xin)壓緊(jin)后(hou)作相對旋轉動(dong)作），使書(shu)(shu)(shu)背(bei)扒(ba)成適當規格圓勢，加工成圓背(bei)書(shu)(shu)(shu)芯(xin)(xin)。書(shu)(shu)(shu)芯(xin)(xin)書(shu)(shu)(shu)背(bei)的(de)(de)(de)形狀分(fen)(fen)為圓背(bei)有脊(ji)(ji)、圓背(bei)無脊(ji)(ji)和(he)方背(bei)（或(huo)稱平(ping)(ping)背(bei)）三種。平(ping)(ping)裝裹背(bei)條(tiao)書(shu)(shu)(shu)刊(kan)的(de)(de)(de)書(shu)(shu)(shu)脊(ji)(ji)不高出(chu)書(shu)(shu)(shu)芯(xin)(xin)平(ping)(ping)面，而精裝書(shu)(shu)(shu)刊(kan)的(de)(de)(de)書(shu)(shu)(shu)脊(ji)(ji)一般要高出(chu)書(shu)(shu)(shu)芯(xin)(xin)的(de)(de)(de)平(ping)(ping)面。書(shu)(shu)(shu)脊(ji)(ji)分(fen)(fen)為真(zhen)脊(ji)(ji)和(he)假脊(ji)(ji)。

真脊(ji)(ji)是利(li)(li)用書(shu)(shu)(shu)(shu)背上(shang)下(xia)兩邊變形的(de)(de)(de)(de)弧度高(gao)出書(shu)(shu)(shu)(shu)芯(xin)平面；假脊(ji)(ji)則是利(li)(li)用紙(zhi)板(ban)鑲在書(shu)(shu)(shu)(shu)背后形成的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)脊(ji)(ji)，書(shu)(shu)(shu)(shu)脊(ji)(ji)的(de)(de)(de)(de)脊(ji)(ji)高(gao)等于封面紙(zhi)板(ban)的(de)(de)(de)(de)厚度。方背書(shu)(shu)(shu)(shu)芯(xin)。是指書(shu)(shu)(shu)(shu)芯(xin)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)背平直方正(zheng)。書(shu)(shu)(shu)(shu)背不突(tu)出，與平裝書(shu)(shu)(shu)(shu)刊的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)背基本相似(si)。

背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯上下環襯互成直(zhi)角(jiao)，由于精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯是用鎖(suo)線(xian)訂訂連(lian)，每一個(ge)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)的(de)(de)訂口折縫里面都(dou)用線(xian)串(chuan)過，因(yin)此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯背(bei)(bei)(bei)(bei)(bei)脊(ji)(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)其它部(bu)分(fen)要(yao)厚一些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的(de)(de)帖(tie)數越多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯其它部(bu)分(fen)厚度(du)的(de)(de)差別(bie)也越大。所以方背(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯的(de)(de)形(xing)(xing)(xing)式(shi)一般(ban)只(zhi)用于厚度(du)約為20mm的(de)(de)精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)脊(ji)(ji)(ji)又稱圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)真脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯背(bei)(bei)(bei)(bei)(bei)部(bu)呈圓(yuan)(yuan)(yuan)弧形(xing)(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)高起有(you)(you)(you)脊(ji)(ji)(ji)壟，堅(jian)硬挺(ting)實，這(zhe)種(zhong)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)的(de)(de)形(xing)(xing)(xing)式(shi)適合(he)于裝(zhuang)(zhuang)(zhuang)訂較厚的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝(zhuang)(zhuang)(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)后有(you)(you)(you)明顯(xian)的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻(fan)閱方便。目前我國(guo)的(de)(de)精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多采用這(zhe)種(zhong)圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)脊(ji)(ji)(ji)的(de)(de)加(jia)工形(xing)(xing)(xing)式(shi)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)無脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)無脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯又稱圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)假脊(ji)(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯背(bei)(bei)(bei)(bei)(bei)部(bu)呈圓(yuan)(yuan)(yuan)弧形(xing)(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯的(de)(de)厚度(du)相同，堅(jian)實挺(ting)括，但沒有(you)(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹(guo)背(bei)(bei)(bei)(bei)(bei)條脊(ji)(ji)(ji)。這(zhe)種(zhong)形(xing)(xing)(xing)式(shi)的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯，一般(ban)常與軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)或塑料壓制而成的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)相配(pei)套。中(zhong)心紙有(you)(you)(you)些機器還沒有(you)(you)(you)沖圓(yuan)(yuan)(yuan)裝(zhuang)(zhuang)(zhuang)置，即將方背(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先(xian)進行沖圓(yuan)(yuan)(yuan)加(jia)工，作(zuo)初(chu)步定(ding)型。先(xian)根據(ju)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯厚度(du)和中(zhong)心紙幅面大小調(diao)定(ding)好夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器及(ji)扒圓(yuan)(yuan)(yuan)輥（或沖圓(yuan)(yuan)(yuan)裝(zhuang)(zhuang)(zhuang)置）的(de)(de)規矩(ju)，再(zai)使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯進入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器內并送到(dao)扒圓(yuan)(yuan)(yuan)輥之間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)扒擠成一定(ding)圓(yuan)(yuan)(yuan)勢。